22712909 has 4 divisors (see below), whose sum is σ = 22852416. Its totient is φ = 22573404.

The previous prime is 22712903. The next prime is 22712927. The reversal of 22712909 is 90921722.

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, and also an emirpimes, since its reverse is a distinct semiprime: 90921722 = 2 ⋅45460861.

It is a cyclic number.

It is not a de Polignac number, because 22712909 - 2¹² = 22708813 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22712903) 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, 69509 + ... + 69834.

It is an arithmetic number, because the mean of its divisors is an integer number (5713104).

Almost surely, 2^22712909 is an apocalyptic number.

It is an amenable number.

22712909 is a deficient number, since it is larger than the sum of its proper divisors (139507).

22712909 is a wasteful number, since it uses less digits than its factorization.

22712909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139506.

The product of its (nonzero) digits is 4536, while the sum is 32.

The square root of 22712909 is about 4765.8062277017. The cubic root of 22712909 is about 283.1984814640.

The spelling of 22712909 in words is "twenty-two million, seven hundred twelve thousand, nine hundred nine".