23161399 has 12 divisors (see below), whose sum is σ = 24771096. Its totient is φ = 21649968.

The previous prime is 23161393. The next prime is 23161403. The reversal of 23161399 is 99316132.

It is not a de Polignac number, because 23161399 - 2¹¹ = 23159351 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23161393) 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 11 ways as a sum of consecutive naturals, for example, 29577 + ... + 30349.

It is an arithmetic number, because the mean of its divisors is an integer number (2064258).

Almost surely, 2^23161399 is an apocalyptic number.

23161399 is a deficient number, since it is larger than the sum of its proper divisors (1609697).

23161399 is an equidigital number, since it uses as much as digits as its factorization.

23161399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 894 (or 875 counting only the distinct ones).

The product of its digits is 8748, while the sum is 34.

The square root of 23161399 is about 4812.6291151511. The cubic root of 23161399 is about 285.0503614706.

The spelling of 23161399 in words is "twenty-three million, one hundred sixty-one thousand, three hundred ninety-nine".