129565937 has 2 divisors, whose sum is σ = 129565938. Its totient is φ = 129565936.

The previous prime is 129565903. The next prime is 129565951. The reversal of 129565937 is 739565921.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 105349696 + 24216241 = 10264^2 + 4921^2 .

It is an emirp because it is prime and its reverse (739565921) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 129565937 - 2¹⁶ = 129500401 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 129565891 and 129565900.

It is not a weakly prime, because it can be changed into another prime (129565967) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64782968 + 64782969.

It is an arithmetic number, because the mean of its divisors is an integer number (64782969).

Almost surely, 2^129565937 is an apocalyptic number.

It is an amenable number.

129565937 is a deficient number, since it is larger than the sum of its proper divisors (1).

129565937 is an equidigital number, since it uses as much as digits as its factorization.

129565937 is an evil number, because the sum of its binary digits is even.

The product of its digits is 510300, while the sum is 47.

The square root of 129565937 is about 11382.7034135130. The cubic root of 129565937 is about 506.0152591127.

The spelling of 129565937 in words is "one hundred twenty-nine million, five hundred sixty-five thousand, nine hundred thirty-seven".