129906434 has 16 divisors (see below), whose sum is σ = 226022208. Its totient is φ = 54842832.

The previous prime is 129906431. The next prime is 129906437. The reversal of 129906434 is 434609921.

It is an interprime number because it is at equal distance from previous prime (129906431) and next prime (129906437).

It is not an unprimeable number, because it can be changed into a prime (129906431) 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, 68309 + ... + 70184.

It is an arithmetic number, because the mean of its divisors is an integer number (14126388).

Almost surely, 2^129906434 is an apocalyptic number.

129906434 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

129906434 is a deficient number, since it is larger than the sum of its proper divisors (96115774).

129906434 is a wasteful number, since it uses less digits than its factorization.

129906434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138569.

The product of its (nonzero) digits is 46656, while the sum is 38.

The square root of 129906434 is about 11397.6503718968. The cubic root of 129906434 is about 506.4581377755.

The spelling of 129906434 in words is "one hundred twenty-nine million, nine hundred six thousand, four hundred thirty-four".