65587979 has 2 divisors, whose sum is σ = 65587980. Its totient is φ = 65587978.

The previous prime is 65587967. The next prime is 65588009. The reversal of 65587979 is 97978556.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 65587979 - 2²⁴ = 48810763 is a prime.

It is not a weakly prime, because it can be changed into another prime (65580979) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32793989 + 32793990.

It is an arithmetic number, because the mean of its divisors is an integer number (32793990).

Almost surely, 2^65587979 is an apocalyptic number.

65587979 is a deficient number, since it is larger than the sum of its proper divisors (1).

65587979 is an equidigital number, since it uses as much as digits as its factorization.

65587979 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4762800, while the sum is 56.

The square root of 65587979 is about 8098.6405649343. The cubic root of 65587979 is about 403.2812986777.

It can be divided in two parts, 65587 and 979, that added together give a palindrome (66566).

The spelling of 65587979 in words is "sixty-five million, five hundred eighty-seven thousand, nine hundred seventy-nine".