129301923 has 16 divisors (see below), whose sum is σ = 178675200. Its totient is φ = 83076000.

The previous prime is 129301919. The next prime is 129301943. The reversal of 129301923 is 329103921.

It is a happy number.

It is not a de Polignac number, because 129301923 - 2² = 129301919 is a prime.

It is not an unprimeable number, because it can be changed into a prime (129301943) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 64348 + ... + 66326.

It is an arithmetic number, because the mean of its divisors is an integer number (11167200).

Almost surely, 2^129301923 is an apocalyptic number.

129301923 is a deficient number, since it is larger than the sum of its proper divisors (49373277).

129301923 is a wasteful number, since it uses less digits than its factorization.

129301923 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2762.

The product of its (nonzero) digits is 2916, while the sum is 30.

The square root of 129301923 is about 11371.1003425350. The cubic root of 129301923 is about 505.6713262345.

The spelling of 129301923 in words is "one hundred twenty-nine million, three hundred one thousand, nine hundred twenty-three".