23772409 has 16 divisors (see below), whose sum is σ = 26497152. Its totient is φ = 21212928.

The previous prime is 23772407. The next prime is 23772451. The reversal of 23772409 is 90427732.

It is a cyclic number.

It is not a de Polignac number, because 23772409 - 2¹ = 23772407 is a prime.

It is not an unprimeable number, because it can be changed into a prime (23772403) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 63547 + ... + 63919.

It is an arithmetic number, because the mean of its divisors is an integer number (1656072).

Almost surely, 2^23772409 is an apocalyptic number.

It is an amenable number.

23772409 is a deficient number, since it is larger than the sum of its proper divisors (2724743).

23772409 is a wasteful number, since it uses less digits than its factorization.

23772409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 576.

The product of its (nonzero) digits is 21168, while the sum is 34.

The square root of 23772409 is about 4875.6957452245. The cubic root of 23772409 is about 287.5352304653.

The spelling of 23772409 in words is "twenty-three million, seven hundred seventy-two thousand, four hundred nine".