129802690 has 8 divisors (see below), whose sum is σ = 233644860. Its totient is φ = 51921072.

The previous prime is 129802657. The next prime is 129802703. The reversal of 129802690 is 96208921.

It can be written as a sum of positive squares in 2 ways, for example, as 126990361 + 2812329 = 11269^2 + 1677^2 .

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

It is a super-2 number, since 2×129802690² = 33697476662472200, 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, 6490125 + ... + 6490144.

Almost surely, 2^129802690 is an apocalyptic number.

129802690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

129802690 is a deficient number, since it is larger than the sum of its proper divisors (103842170).

129802690 is a wasteful number, since it uses less digits than its factorization.

129802690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12980276.

The product of its (nonzero) digits is 15552, while the sum is 37.

The square root of 129802690 is about 11393.0983494395. The cubic root of 129802690 is about 506.3232817759.

The spelling of 129802690 in words is "one hundred twenty-nine million, eight hundred two thousand, six hundred ninety".