23921247 has 32 divisors (see below), whose sum is σ = 38707200. Its totient is φ = 12836448.

The previous prime is 23921231. The next prime is 23921251. The reversal of 23921247 is 74212932.

It is not a de Polignac number, because 23921247 - 2⁴ = 23921231 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23921257) 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 31 ways as a sum of consecutive naturals, for example, 66454 + ... + 66812.

It is an arithmetic number, because the mean of its divisors is an integer number (1209600).

Almost surely, 2^23921247 is an apocalyptic number.

23921247 is a deficient number, since it is larger than the sum of its proper divisors (14785953).

23921247 is a wasteful number, since it uses less digits than its factorization.

23921247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 555.

The product of its digits is 6048, while the sum is 30.

The square root of 23921247 is about 4890.9351866489. The cubic root of 23921247 is about 288.1340642230.

The spelling of 23921247 in words is "twenty-three million, nine hundred twenty-one thousand, two hundred forty-seven".