23778969 has 4 divisors (see below), whose sum is σ = 31705296. Its totient is φ = 15852644.

The previous prime is 23778949. The next prime is 23778973. The reversal of 23778969 is 96987732.

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 23778969 - 2¹⁵ = 23746201 is a prime.

It is a super-2 number, since 2×23778969² = 1130878733405922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (23778949) 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, 3963159 + ... + 3963164.

It is an arithmetic number, because the mean of its divisors is an integer number (7926324).

Almost surely, 2^23778969 is an apocalyptic number.

It is an amenable number.

23778969 is a deficient number, since it is larger than the sum of its proper divisors (7926327).

23778969 is an equidigital number, since it uses as much as digits as its factorization.

23778969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7926326.

The product of its digits is 1143072, while the sum is 51.

The square root of 23778969 is about 4876.3684233249. The cubic root of 23778969 is about 287.5616764968.

The spelling of 23778969 in words is "twenty-three million, seven hundred seventy-eight thousand, nine hundred sixty-nine".