53396309 has 4 divisors (see below), whose sum is σ = 54698700. Its totient is φ = 52093920.

The previous prime is 53396249. The next prime is 53396323. The reversal of 53396309 is 90369335.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3411409 + 49984900 = 1847^2 + 7070^2 .

It is a cyclic number.

It is not a de Polignac number, because 53396309 - 2⁸ = 53396053 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 (53396339) 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, 651134 + ... + 651215.

It is an arithmetic number, because the mean of its divisors is an integer number (13674675).

Almost surely, 2^53396309 is an apocalyptic number.

It is an amenable number.

53396309 is a deficient number, since it is larger than the sum of its proper divisors (1302391).

53396309 is a wasteful number, since it uses less digits than its factorization.

53396309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1302390.

The product of its (nonzero) digits is 65610, while the sum is 38.

The square root of 53396309 is about 7307.2778105119. The cubic root of 53396309 is about 376.5625092050.

The spelling of 53396309 in words is "fifty-three million, three hundred ninety-six thousand, three hundred nine".