53499509 has 4 divisors (see below), whose sum is σ = 61142304. Its totient is φ = 45856716.

The previous prime is 53499499. The next prime is 53499533. The reversal of 53499509 is 90599435.

53499509 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 90599435 = 5 ⋅18119887.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-53499509 is a prime.

It is a super-3 number, since 3×53499509³ (a number of 24 digits) contains 333 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 53499509.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53499409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3821387 + ... + 3821400.

It is an arithmetic number, because the mean of its divisors is an integer number (15285576).

Almost surely, 2^53499509 is an apocalyptic number.

It is an amenable number.

53499509 is a deficient number, since it is larger than the sum of its proper divisors (7642795).

53499509 is an equidigital number, since it uses as much as digits as its factorization.

53499509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7642794.

The product of its (nonzero) digits is 218700, while the sum is 44.

The square root of 53499509 is about 7314.3358550179. The cubic root of 53499509 is about 376.8049494446.

The spelling of 53499509 in words is "fifty-three million, four hundred ninety-nine thousand, five hundred nine".