23377721 has 4 divisors (see below), whose sum is σ = 23443200. Its totient is φ = 23312244.

The previous prime is 23377699. The next prime is 23377727. The reversal of 23377721 is 12777332.

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 23377721 - 2¹⁴ = 23361337 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23377727) 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, 32201 + ... + 32918.

It is an arithmetic number, because the mean of its divisors is an integer number (5860800).

Almost surely, 2^23377721 is an apocalyptic number.

It is an amenable number.

23377721 is a deficient number, since it is larger than the sum of its proper divisors (65479).

23377721 is an equidigital number, since it uses as much as digits as its factorization.

23377721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65478.

The product of its digits is 12348, while the sum is 32.

The square root of 23377721 is about 4835.0512923856. The cubic root of 23377721 is about 285.9350472741.

The spelling of 23377721 in words is "twenty-three million, three hundred seventy-seven thousand, seven hundred twenty-one".