23091129 has 16 divisors (see below), whose sum is σ = 35006400. Its totient is φ = 15035328.

The previous prime is 23091119. The next prime is 23091143. The reversal of 23091129 is 92119032.

It is not a de Polignac number, because 23091129 - 2⁴ = 23091113 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (23091119) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8784 + ... + 11105.

It is an arithmetic number, because the mean of its divisors is an integer number (2187900).

Almost surely, 2^23091129 is an apocalyptic number.

It is an amenable number.

23091129 is a deficient number, since it is larger than the sum of its proper divisors (11915271).

23091129 is a wasteful number, since it uses less digits than its factorization.

23091129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19941 (or 19935 counting only the distinct ones).

The product of its (nonzero) digits is 972, while the sum is 27.

The square root of 23091129 is about 4805.3229860229. The cubic root of 23091129 is about 284.7617954226.

It can be divided in two parts, 23091 and 129, that added together give a triangular number (23220 = T₂₁₅).

The spelling of 23091129 in words is "twenty-three million, ninety-one thousand, one hundred twenty-nine".