129949331 has 2 divisors, whose sum is σ = 129949332. Its totient is φ = 129949330.

The previous prime is 129949283. The next prime is 129949363. The reversal of 129949331 is 133949921.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-129949331 is a prime.

It is a super-2 number, since 2×129949331² = 33773657254695122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (129948331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64974665 + 64974666.

It is an arithmetic number, because the mean of its divisors is an integer number (64974666).

Almost surely, 2^129949331 is an apocalyptic number.

129949331 is a deficient number, since it is larger than the sum of its proper divisors (1).

129949331 is an equidigital number, since it uses as much as digits as its factorization.

129949331 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 52488, while the sum is 41.

The square root of 129949331 is about 11399.5320517993. The cubic root of 129949331 is about 506.5138782628.

The spelling of 129949331 in words is "one hundred twenty-nine million, nine hundred forty-nine thousand, three hundred thirty-one".