129690854 has 8 divisors (see below), whose sum is σ = 194616840. Its totient is φ = 64818576.

The previous prime is 129690839. The next prime is 129690857. The reversal of 129690854 is 458096921.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×129690854² = 33639435222498632, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129690857) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6719 + ... + 17450.

It is an arithmetic number, because the mean of its divisors is an integer number (24327105).

Almost surely, 2^129690854 is an apocalyptic number.

129690854 is a deficient number, since it is larger than the sum of its proper divisors (64925986).

129690854 is a wasteful number, since it uses less digits than its factorization.

129690854 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26854.

The product of its (nonzero) digits is 155520, while the sum is 44.

The square root of 129690854 is about 11388.1892327095. The cubic root of 129690854 is about 506.1778265449.

The spelling of 129690854 in words is "one hundred twenty-nine million, six hundred ninety thousand, eight hundred fifty-four".