65912131 has 2 divisors, whose sum is σ = 65912132. Its totient is φ = 65912130.

The previous prime is 65912129. The next prime is 65912141. The reversal of 65912131 is 13121956.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 65912131 - 2¹ = 65912129 is a prime.

It is a super-2 number, since 2×65912131² = 8688818025922322, which contains 22 as substring.

Together with 65912129, it forms a pair of twin primes.

It is equal to p_3891205 and since 65912131 and 3891205 have the same sum of digits, it is a Honaker prime.

It is a self number, because there is not a number n which added to its sum of digits gives 65912131.

It is not a weakly prime, because it can be changed into another prime (65912101) 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, 32956065 + 32956066.

It is an arithmetic number, because the mean of its divisors is an integer number (32956066).

Almost surely, 2^65912131 is an apocalyptic number.

65912131 is a deficient number, since it is larger than the sum of its proper divisors (1).

65912131 is an equidigital number, since it uses as much as digits as its factorization.

65912131 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1620, while the sum is 28.

The square root of 65912131 is about 8118.6286403555. The cubic root of 65912131 is about 403.9445791212.

The spelling of 65912131 in words is "sixty-five million, nine hundred twelve thousand, one hundred thirty-one".