129983690 has 8 divisors (see below), whose sum is σ = 233970660. Its totient is φ = 51993472.

The previous prime is 129983687. The next prime is 129983729. The reversal of 129983690 is 96389921.

It can be written as a sum of positive squares in 2 ways, for example, as 128845201 + 1138489 = 11351^2 + 1067^2 .

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

It is a super-2 number, since 2×129983690² = 33791519332032200, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6499175 + ... + 6499194.

Almost surely, 2^129983690 is an apocalyptic number.

129983690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

129983690 is a deficient number, since it is larger than the sum of its proper divisors (103986970).

129983690 is a wasteful number, since it uses less digits than its factorization.

129983690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12998376.

The product of its (nonzero) digits is 209952, while the sum is 47.

The square root of 129983690 is about 11401.0389877414. The cubic root of 129983690 is about 506.5585156011.

The spelling of 129983690 in words is "one hundred twenty-nine million, nine hundred eighty-three thousand, six hundred ninety".