65912129 has 2 divisors, whose sum is σ = 65912130. Its totient is φ = 65912128.

The previous prime is 65912117. The next prime is 65912131. The reversal of 65912129 is 92121956.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 60031504 + 5880625 = 7748^2 + 2425^2 .

It is a cyclic number.

It is not a de Polignac number, because 65912129 - 2⁴ = 65912113 is a prime.

Together with 65912131, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (65912029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32956064 + 32956065.

It is an arithmetic number, because the mean of its divisors is an integer number (32956065).

Almost surely, 2^65912129 is an apocalyptic number.

It is an amenable number.

65912129 is a deficient number, since it is larger than the sum of its proper divisors (1).

65912129 is an equidigital number, since it uses as much as digits as its factorization.

65912129 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9720, while the sum is 35.

The square root of 65912129 is about 8118.6285171820. The cubic root of 65912129 is about 403.9445750355.

The spelling of 65912129 in words is "sixty-five million, nine hundred twelve thousand, one hundred twenty-nine".