23977769 has 4 divisors (see below), whose sum is σ = 25388244. Its totient is φ = 22567296.

The previous prime is 23977763. The next prime is 23977771. The reversal of 23977769 is 96777932.

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

It can be written as a sum of positive squares in 2 ways, for example, as 9078169 + 14899600 = 3013^2 + 3860^2 .

It is not a de Polignac number, because 23977769 - 2²⁴ = 7200553 is a prime.

It is a super-2 number, since 2×23977769² = 1149866812434722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23977763) 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, 705212 + ... + 705245.

It is an arithmetic number, because the mean of its divisors is an integer number (6347061).

Almost surely, 2^23977769 is an apocalyptic number.

It is an amenable number.

23977769 is a deficient number, since it is larger than the sum of its proper divisors (1410475).

23977769 is a wasteful number, since it uses less digits than its factorization.

23977769 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1410474.

The product of its digits is 1000188, while the sum is 50.

The square root of 23977769 is about 4896.7100179610. The cubic root of 23977769 is about 288.3608236307.

The spelling of 23977769 in words is "twenty-three million, nine hundred seventy-seven thousand, seven hundred sixty-nine".