129927650 has 12 divisors (see below), whose sum is σ = 241665522. Its totient is φ = 51971040.

The previous prime is 129927613. The next prime is 129927653. The reversal of 129927650 is 56729921.

It can be written as a sum of positive squares in 3 ways, for example, as 127260961 + 2666689 = 11281^2 + 1633^2 .

It is a junction number, because it is equal to n+sod(n) for n = 129927598 and 129927607.

It is not an unprimeable number, because it can be changed into a prime (129927653) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1299227 + ... + 1299326.

Almost surely, 2^129927650 is an apocalyptic number.

129927650 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

129927650 is a deficient number, since it is larger than the sum of its proper divisors (111737872).

129927650 is a wasteful number, since it uses less digits than its factorization.

129927650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2598565 (or 2598560 counting only the distinct ones).

The product of its (nonzero) digits is 68040, while the sum is 41.

The square root of 129927650 is about 11398.5810520433. The cubic root of 129927650 is about 506.4857074414.

The spelling of 129927650 in words is "one hundred twenty-nine million, nine hundred twenty-seven thousand, six hundred fifty".