129473136 has 60 divisors (see below), whose sum is σ = 390223288. Its totient is φ = 39837312.

The previous prime is 129473093. The next prime is 129473147. The reversal of 129473136 is 631374921.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 129473136.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 32710 + ... + 36453.

Almost surely, 2^129473136 is an apocalyptic number.

129473136 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

129473136 is an abundant number, since it is smaller than the sum of its proper divisors (260750152).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

129473136 is a wasteful number, since it uses less digits than its factorization.

129473136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69190 (or 69181 counting only the distinct ones).

The product of its digits is 27216, while the sum is 36.

The square root of 129473136 is about 11378.6262791253. The cubic root of 129473136 is about 505.8944198990.

The spelling of 129473136 in words is "one hundred twenty-nine million, four hundred seventy-three thousand, one hundred thirty-six".