53297509 has 4 divisors (see below), whose sum is σ = 55614816. Its totient is φ = 50980204.

The previous prime is 53297507. The next prime is 53297513. The reversal of 53297509 is 90579235.

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: 90579235 = 5 ⋅18115847.

It is a cyclic number.

It is not a de Polignac number, because 53297509 - 2¹ = 53297507 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53297507) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1158619 + ... + 1158664.

It is an arithmetic number, because the mean of its divisors is an integer number (13903704).

Almost surely, 2^53297509 is an apocalyptic number.

It is an amenable number.

53297509 is a deficient number, since it is larger than the sum of its proper divisors (2317307).

53297509 is a wasteful number, since it uses less digits than its factorization.

53297509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2317306.

The product of its (nonzero) digits is 85050, while the sum is 40.

The square root of 53297509 is about 7300.5142969520. The cubic root of 53297509 is about 376.3301127040.

The spelling of 53297509 in words is "fifty-three million, two hundred ninety-seven thousand, five hundred nine".