65617939 has 2 divisors, whose sum is σ = 65617940. Its totient is φ = 65617938.

The previous prime is 65617913. The next prime is 65617949. The reversal of 65617939 is 93971656.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 65617939 - 2⁵ = 65617907 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (65617949) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32808969 + 32808970.

It is an arithmetic number, because the mean of its divisors is an integer number (32808970).

Almost surely, 2^65617939 is an apocalyptic number.

65617939 is a deficient number, since it is larger than the sum of its proper divisors (1).

65617939 is an equidigital number, since it uses as much as digits as its factorization.

65617939 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 306180, while the sum is 46.

The square root of 65617939 is about 8100.4900469046. The cubic root of 65617939 is about 403.3426944226.

The spelling of 65617939 in words is "sixty-five million, six hundred seventeen thousand, nine hundred thirty-nine".