23457779 has 4 divisors (see below), whose sum is σ = 23626680. Its totient is φ = 23288880.

The previous prime is 23457767. The next prime is 23457787. The reversal of 23457779 is 97775432.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 23457779 - 2²⁴ = 6680563 is a prime.

It is a super-2 number, since 2×23457779² = 1100534791225682, which contains 22 as substring.

It is a Duffinian number.

It is a plaindrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (23457179) 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, 84242 + ... + 84519.

It is an arithmetic number, because the mean of its divisors is an integer number (5906670).

Almost surely, 2^23457779 is an apocalyptic number.

23457779 is a deficient number, since it is larger than the sum of its proper divisors (168901).

23457779 is a wasteful number, since it uses less digits than its factorization.

23457779 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 168900.

The product of its digits is 370440, while the sum is 44.

The square root of 23457779 is about 4843.3231360296. The cubic root of 23457779 is about 286.2610743032.

The spelling of 23457779 in words is "twenty-three million, four hundred fifty-seven thousand, seven hundred seventy-nine".