129947034 has 32 divisors (see below), whose sum is σ = 305053056. Its totient is φ = 36123840.

The previous prime is 129947011. The next prime is 129947039. The reversal of 129947034 is 430749921.

It is a junction number, because it is equal to n+sod(n) for n = 129946983 and 129947001.

It is not an unprimeable number, because it can be changed into a prime (129947039) 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, 40257 + ... + 43364.

It is an arithmetic number, because the mean of its divisors is an integer number (9532908).

Almost surely, 2^129947034 is an apocalyptic number.

129947034 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

129947034 is an abundant number, since it is smaller than the sum of its proper divisors (175106022).

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

129947034 is a wasteful number, since it uses less digits than its factorization.

129947034 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83670.

The product of its (nonzero) digits is 54432, while the sum is 39.

The square root of 129947034 is about 11399.4313016045. The cubic root of 129947034 is about 506.5108938452.

The spelling of 129947034 in words is "one hundred twenty-nine million, nine hundred forty-seven thousand, thirty-four".