23209479 has 24 divisors (see below), whose sum is σ = 34491600. Its totient is φ = 15033600.

The previous prime is 23209451. The next prime is 23209499. The reversal of 23209479 is 97490232.

It is not a de Polignac number, because 23209479 - 2²⁴ = 6432263 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23209429) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 57679 + ... + 58079.

It is an arithmetic number, because the mean of its divisors is an integer number (1437150).

Almost surely, 2^23209479 is an apocalyptic number.

23209479 is a deficient number, since it is larger than the sum of its proper divisors (11282121).

23209479 is a wasteful number, since it uses less digits than its factorization.

23209479 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 575 (or 572 counting only the distinct ones).

The product of its (nonzero) digits is 27216, while the sum is 36.

The square root of 23209479 is about 4817.6217161583. The cubic root of 23209479 is about 285.2474674240.

The spelling of 23209479 in words is "twenty-three million, two hundred nine thousand, four hundred seventy-nine".