23391901 has 12 divisors (see below), whose sum is σ = 25700052. Its totient is φ = 21161088.

The previous prime is 23391889. The next prime is 23391913. The reversal of 23391901 is 10919332.

It is the 1975-th star number.

It is an interprime number because it is at equal distance from previous prime (23391889) and next prime (23391913).

It can be written as a sum of positive squares in 6 ways, for example, as 3132900 + 20259001 = 1770^2 + 4501^2 .

It is not a de Polignac number, because 23391901 - 2¹⁹ = 22867613 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 23391901.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23391941) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 148915 + ... + 149071.

It is an arithmetic number, because the mean of its divisors is an integer number (2141671).

Almost surely, 2^23391901 is an apocalyptic number.

It is an amenable number.

23391901 is a deficient number, since it is larger than the sum of its proper divisors (2308151).

23391901 is an equidigital number, since it uses as much as digits as its factorization.

23391901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 400 (or 243 counting only the distinct ones).

The product of its (nonzero) digits is 1458, while the sum is 28.

The square root of 23391901 is about 4836.5174454353. The cubic root of 23391901 is about 285.9928478822.

The spelling of 23391901 in words is "twenty-three million, three hundred ninety-one thousand, nine hundred one".