129640996 has 9 divisors (see below), whose sum is σ = 226911601. Its totient is φ = 64809112.

The previous prime is 129640981. The next prime is 129641011. The reversal of 129640996 is 699046921.

The square root of 129640996 is 11386.

It is a perfect power (a square), and thus also a powerful number.

It is an interprime number because it is at equal distance from previous prime (129640981) and next prime (129641011).

It can be written as a sum of positive squares in only one way, i.e., 15920100 + 113720896 = 3990^2 + 10664^2 .

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 19926 + ... + 25618.

Almost surely, 2^129640996 is an apocalyptic number.

129640996 is the 11386-th square number.

It is an amenable number.

129640996 is a deficient number, since it is larger than the sum of its proper divisors (97270605).

129640996 is an frugal number, since it uses more digits than its factorization.

129640996 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11390 (or 5695 counting only the distinct ones).

The product of its (nonzero) digits is 209952, while the sum is 46.

The cubic root of 129640996 is about 506.1129536876.

The spelling of 129640996 in words is "one hundred twenty-nine million, six hundred forty thousand, nine hundred ninety-six".