129634870 has 16 divisors (see below), whose sum is σ = 240870528. Its totient is φ = 50181120.

The previous prime is 129634867. The next prime is 129634871. The reversal of 129634870 is 78436921.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129634871) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 208779 + ... + 209398.

It is an arithmetic number, because the mean of its divisors is an integer number (15054408).

Almost surely, 2^129634870 is an apocalyptic number.

129634870 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

129634870 is a deficient number, since it is larger than the sum of its proper divisors (111235658).

129634870 is a wasteful number, since it uses less digits than its factorization.

129634870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 418215.

The product of its (nonzero) digits is 72576, while the sum is 40.

The square root of 129634870 is about 11385.7309822426. The cubic root of 129634870 is about 506.1049816806.

The spelling of 129634870 in words is "one hundred twenty-nine million, six hundred thirty-four thousand, eight hundred seventy".