65982979 has 2 divisors, whose sum is σ = 65982980. Its totient is φ = 65982978.

The previous prime is 65982937. The next prime is 65983009. The reversal of 65982979 is 97928956.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 65982979 - 2²³ = 57594371 is a prime.

It is not a weakly prime, because it can be changed into another prime (65982919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32991489 + 32991490.

It is an arithmetic number, because the mean of its divisors is an integer number (32991490).

Almost surely, 2^65982979 is an apocalyptic number.

65982979 is a deficient number, since it is larger than the sum of its proper divisors (1).

65982979 is an equidigital number, since it uses as much as digits as its factorization.

65982979 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2449440, while the sum is 55.

The square root of 65982979 is about 8122.9907669528. The cubic root of 65982979 is about 404.0892586984.

It can be divided in two parts, 659 and 82979, that added together give a palindrome (83638).

The spelling of 65982979 in words is "sixty-five million, nine hundred eighty-two thousand, nine hundred seventy-nine".