65239157 has 2 divisors, whose sum is σ = 65239158. Its totient is φ = 65239156.

The previous prime is 65239133. The next prime is 65239169. The reversal of 65239157 is 75193256.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 47210641 + 18028516 = 6871^2 + 4246^2 .

It is a cyclic number.

It is not a de Polignac number, because 65239157 - 2¹⁰ = 65238133 is a prime.

It is a super-2 number, since 2×65239157² = 8512295212141298, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 65239157.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (65239117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32619578 + 32619579.

It is an arithmetic number, because the mean of its divisors is an integer number (32619579).

Almost surely, 2^65239157 is an apocalyptic number.

It is an amenable number.

65239157 is a deficient number, since it is larger than the sum of its proper divisors (1).

65239157 is an equidigital number, since it uses as much as digits as its factorization.

65239157 is an evil number, because the sum of its binary digits is even.

The product of its digits is 56700, while the sum is 38.

The square root of 65239157 is about 8077.0760179659. The cubic root of 65239157 is about 402.5650926708.

The spelling of 65239157 in words is "sixty-five million, two hundred thirty-nine thousand, one hundred fifty-seven".