129679390 has 32 divisors (see below), whose sum is σ = 237746016. Its totient is φ = 50918400.

The previous prime is 129679379. The next prime is 129679391. The reversal of 129679390 is 93976921.

It is a self number, because there is not a number n which added to its sum of digits gives 129679390.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129679391) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 292509 + ... + 292951.

It is an arithmetic number, because the mean of its divisors is an integer number (7429563).

Almost surely, 2^129679390 is an apocalyptic number.

129679390 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

129679390 is a deficient number, since it is larger than the sum of its proper divisors (108066626).

129679390 is a wasteful number, since it uses less digits than its factorization.

129679390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 924.

The product of its (nonzero) digits is 183708, while the sum is 46.

The square root of 129679390 is about 11387.6858931040. The cubic root of 129679390 is about 506.1629116057.

The spelling of 129679390 in words is "one hundred twenty-nine million, six hundred seventy-nine thousand, three hundred ninety".