129983951 has 2 divisors, whose sum is σ = 129983952. Its totient is φ = 129983950.

The previous prime is 129983947. The next prime is 129983957. The reversal of 129983951 is 159389921.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 129983951 - 2² = 129983947 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 129983896 and 129983905.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (129983957) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64991975 + 64991976.

It is an arithmetic number, because the mean of its divisors is an integer number (64991976).

Almost surely, 2^129983951 is an apocalyptic number.

129983951 is a deficient number, since it is larger than the sum of its proper divisors (1).

129983951 is an equidigital number, since it uses as much as digits as its factorization.

129983951 is an evil number, because the sum of its binary digits is even.

The product of its digits is 174960, while the sum is 47.

The square root of 129983951 is about 11401.0504340609. The cubic root of 129983951 is about 506.5588546480.

The spelling of 129983951 in words is "one hundred twenty-nine million, nine hundred eighty-three thousand, nine hundred fifty-one".