53757809 has 4 divisors (see below), whose sum is σ = 61437504. Its totient is φ = 46078116.

The previous prime is 53757797. The next prime is 53757839. The reversal of 53757809 is 90875735.

It is a happy number.

53757809 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: 90875735 = 5 ⋅18175147.

It is a de Polignac number, because none of the positive numbers 2^k-53757809 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 53757809.

It is not an unprimeable number, because it can be changed into a prime (53757839) 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, 3839837 + ... + 3839850.

It is an arithmetic number, because the mean of its divisors is an integer number (15359376).

Almost surely, 2^53757809 is an apocalyptic number.

It is an amenable number.

53757809 is a deficient number, since it is larger than the sum of its proper divisors (7679695).

53757809 is an equidigital number, since it uses as much as digits as its factorization.

53757809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7679694.

The product of its (nonzero) digits is 264600, while the sum is 44.

The square root of 53757809 is about 7331.9716993453. The cubic root of 53757809 is about 377.4103911396.

The spelling of 53757809 in words is "fifty-three million, seven hundred fifty-seven thousand, eight hundred nine".