129163690 has 8 divisors (see below), whose sum is σ = 232494660. Its totient is φ = 51665472.

The previous prime is 129163679. The next prime is 129163711. The reversal of 129163690 is 96361921.

It can be written as a sum of positive squares in 2 ways, for example, as 122522761 + 6640929 = 11069^2 + 2577^2 .

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

It is a super-2 number, since 2×129163690² = 33366517628832200, which contains 22 as substring.

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, 6458175 + ... + 6458194.

Almost surely, 2^129163690 is an apocalyptic number.

129163690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

129163690 is a deficient number, since it is larger than the sum of its proper divisors (103330970).

129163690 is a wasteful number, since it uses less digits than its factorization.

129163690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12916376.

The product of its (nonzero) digits is 17496, while the sum is 37.

The square root of 129163690 is about 11365.0204575267. The cubic root of 129163690 is about 505.4910623809.

The spelling of 129163690 in words is "one hundred twenty-nine million, one hundred sixty-three thousand, six hundred ninety".