65629657 has 2 divisors, whose sum is σ = 65629658. Its totient is φ = 65629656.

The previous prime is 65629637. The next prime is 65629661. The reversal of 65629657 is 75692656.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 40589641 + 25040016 = 6371^2 + 5004^2 .

It is a cyclic number.

It is not a de Polignac number, because 65629657 - 2²³ = 57241049 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (65629637) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32814828 + 32814829.

It is an arithmetic number, because the mean of its divisors is an integer number (32814829).

Almost surely, 2^65629657 is an apocalyptic number.

It is an amenable number.

65629657 is a deficient number, since it is larger than the sum of its proper divisors (1).

65629657 is an equidigital number, since it uses as much as digits as its factorization.

65629657 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 680400, while the sum is 46.

The square root of 65629657 is about 8101.2133041909. The cubic root of 65629657 is about 403.3667025340.

The spelling of 65629657 in words is "sixty-five million, six hundred twenty-nine thousand, six hundred fifty-seven".