64553239 has 2 divisors, whose sum is σ = 64553240. Its totient is φ = 64553238.

The previous prime is 64553221. The next prime is 64553273. The reversal of 64553239 is 93235546.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 64553239 - 2²¹ = 62456087 is a prime.

It is a super-2 number, since 2×64553239² = 8334241330782242, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 64553198 and 64553207.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64551239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32276619 + 32276620.

It is an arithmetic number, because the mean of its divisors is an integer number (32276620).

Almost surely, 2^64553239 is an apocalyptic number.

64553239 is a deficient number, since it is larger than the sum of its proper divisors (1).

64553239 is an equidigital number, since it uses as much as digits as its factorization.

64553239 is an evil number, because the sum of its binary digits is even.

The product of its digits is 97200, while the sum is 37.

The square root of 64553239 is about 8034.5030337912. The cubic root of 64553239 is about 401.1492759992.

The spelling of 64553239 in words is "sixty-four million, five hundred fifty-three thousand, two hundred thirty-nine".