129516944 has 10 divisors (see below), whose sum is σ = 250939110. Its totient is φ = 64758464.

The previous prime is 129516943. The next prime is 129516971. The reversal of 129516944 is 449615921.

It can be written as a sum of positive squares in only one way, i.e., 129504400 + 12544 = 11380^2 + 112^2 .

It is not an unprimeable number, because it can be changed into a prime (129516941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4047389 + ... + 4047420.

It is an arithmetic number, because the mean of its divisors is an integer number (25093911).

Almost surely, 2^129516944 is an apocalyptic number.

It is an amenable number.

129516944 is a deficient number, since it is larger than the sum of its proper divisors (121422166).

129516944 is an equidigital number, since it uses as much as digits as its factorization.

129516944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8094817 (or 8094811 counting only the distinct ones).

The product of its digits is 77760, while the sum is 41.

The square root of 129516944 is about 11380.5511290095. The cubic root of 129516944 is about 505.9514709196.

The spelling of 129516944 in words is "one hundred twenty-nine million, five hundred sixteen thousand, nine hundred forty-four".