129006690 has 32 divisors (see below), whose sum is σ = 312517440. Its totient is φ = 34079424.

The previous prime is 129006677. The next prime is 129006707. The reversal of 129006690 is 96600921.

It is a happy number.

It is a super-2 number, since 2×129006690² = 33285452129512200, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16885 + ... + 23304.

It is an arithmetic number, because the mean of its divisors is an integer number (9766170).

Almost surely, 2^129006690 is an apocalyptic number.

129006690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

129006690 is an abundant number, since it is smaller than the sum of its proper divisors (183510750).

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

129006690 is a wasteful number, since it uses less digits than its factorization.

129006690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40306.

The product of its (nonzero) digits is 5832, while the sum is 33.

The square root of 129006690 is about 11358.1111986104. Note that the first 4 decimals coincide. The cubic root of 129006690 is about 505.2861692108.

The spelling of 129006690 in words is "one hundred twenty-nine million, six thousand, six hundred ninety".