65869939 has 2 divisors, whose sum is σ = 65869940. Its totient is φ = 65869938.

The previous prime is 65869931. The next prime is 65869961. The reversal of 65869939 is 93996856.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 65869939 - 2³ = 65869931 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 65869939.

It is not a weakly prime, because it can be changed into another prime (65869931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32934969 + 32934970.

It is an arithmetic number, because the mean of its divisors is an integer number (32934970).

Almost surely, 2^65869939 is an apocalyptic number.

65869939 is a deficient number, since it is larger than the sum of its proper divisors (1).

65869939 is an equidigital number, since it uses as much as digits as its factorization.

65869939 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3149280, while the sum is 55.

The square root of 65869939 is about 8116.0297559829. The cubic root of 65869939 is about 403.8583690548.

The spelling of 65869939 in words is "sixty-five million, eight hundred sixty-nine thousand, nine hundred thirty-nine".