23391397 has 4 divisors (see below), whose sum is σ = 23423296. Its totient is φ = 23359500.

The previous prime is 23391373. The next prime is 23391409. The reversal of 23391397 is 79319332.

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.

It is a cyclic number.

It is not a de Polignac number, because 23391397 - 2¹¹ = 23389349 is a prime.

It is a super-2 number, since 2×23391397² = 1094314907223218, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23391367) 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 3 ways as a sum of consecutive naturals, for example, 14823 + ... + 16324.

It is an arithmetic number, because the mean of its divisors is an integer number (5855824).

Almost surely, 2^23391397 is an apocalyptic number.

It is an amenable number.

23391397 is a deficient number, since it is larger than the sum of its proper divisors (31899).

23391397 is an equidigital number, since it uses as much as digits as its factorization.

23391397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31898.

The product of its digits is 30618, while the sum is 37.

The square root of 23391397 is about 4836.4653415485. The cubic root of 23391397 is about 285.9907938745.

The spelling of 23391397 in words is "twenty-three million, three hundred ninety-one thousand, three hundred ninety-seven".