129657910 has 8 divisors (see below), whose sum is σ = 233384256. Its totient is φ = 51863160.

The previous prime is 129657907. The next prime is 129657961. The reversal of 129657910 is 19756921.

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

It is a super-2 number, since 2×129657910² = 33622347251136200, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6482886 + ... + 6482905.

It is an arithmetic number, because the mean of its divisors is an integer number (29173032).

Almost surely, 2^129657910 is an apocalyptic number.

129657910 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

129657910 is a deficient number, since it is larger than the sum of its proper divisors (103726346).

129657910 is a wasteful number, since it uses less digits than its factorization.

129657910 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12965798.

The product of its (nonzero) digits is 34020, while the sum is 40.

The square root of 129657910 is about 11386.7427300348. The cubic root of 129657910 is about 506.1349632435.

The spelling of 129657910 in words is "one hundred twenty-nine million, six hundred fifty-seven thousand, nine hundred ten".