129589973 has 2 divisors, whose sum is σ = 129589974. Its totient is φ = 129589972.

The previous prime is 129589927. The next prime is 129590011. The reversal of 129589973 is 379985921.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 83594449 + 45995524 = 9143^2 + 6782^2 .

It is a cyclic number.

It is not a de Polignac number, because 129589973 - 2⁶ = 129589909 is a prime.

It is a super-2 number, since 2×129589973² = 33587122204281458, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (129589903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64794986 + 64794987.

It is an arithmetic number, because the mean of its divisors is an integer number (64794987).

Almost surely, 2^129589973 is an apocalyptic number.

It is an amenable number.

129589973 is a deficient number, since it is larger than the sum of its proper divisors (1).

129589973 is an equidigital number, since it uses as much as digits as its factorization.

129589973 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1224720, while the sum is 53.

The square root of 129589973 is about 11383.7591770030. The cubic root of 129589973 is about 506.0465477652.

The spelling of 129589973 in words is "one hundred twenty-nine million, five hundred eighty-nine thousand, nine hundred seventy-three".