23228929 has 4 divisors (see below), whose sum is σ = 23238576. Its totient is φ = 23219284.

The previous prime is 23228927. The next prime is 23228939. The reversal of 23228929 is 92982232.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 23228929 - 2¹ = 23228927 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23228921) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2142 + ... + 7144.

It is an arithmetic number, because the mean of its divisors is an integer number (5809644).

Almost surely, 2^23228929 is an apocalyptic number.

It is an amenable number.

23228929 is a deficient number, since it is larger than the sum of its proper divisors (9647).

23228929 is an equidigital number, since it uses as much as digits as its factorization.

23228929 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9646.

The product of its digits is 31104, while the sum is 37.

The square root of 23228929 is about 4819.6399243097. The cubic root of 23228929 is about 285.3271261727.

It can be divided in two parts, 232 and 28929, that added together give a triangular number (29161 = T₂₄₁).

The spelling of 23228929 in words is "twenty-three million, two hundred twenty-eight thousand, nine hundred twenty-nine".