129802023 has 24 divisors (see below), whose sum is σ = 206846640. Its totient is φ = 77927040.

The previous prime is 129802007. The next prime is 129802027. The reversal of 129802023 is 320208921.

It is a happy number.

It is not a de Polignac number, because 129802023 - 2⁴ = 129802007 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129802027) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8733 + ... + 18326.

It is an arithmetic number, because the mean of its divisors is an integer number (8618610).

Almost surely, 2^129802023 is an apocalyptic number.

129802023 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

129802023 is a deficient number, since it is larger than the sum of its proper divisors (77044617).

129802023 is a wasteful number, since it uses less digits than its factorization.

129802023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27119 (or 27116 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 129802023 is about 11393.0690772943. The cubic root of 129802023 is about 506.3224145155.

The spelling of 129802023 in words is "one hundred twenty-nine million, eight hundred two thousand, twenty-three".