22397913 has 12 divisors (see below), whose sum is σ = 33227428. Its totient is φ = 14528160.

The previous prime is 22397911. The next prime is 22397923. The reversal of 22397913 is 31979322.

It can be written as a sum of positive squares in 2 ways, for example, as 18429849 + 3968064 = 4293^2 + 1992^2 .

It is not a de Polignac number, because 22397913 - 2¹ = 22397911 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (22397911) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 33298 + ... + 33963.

Almost surely, 2^22397913 is an apocalyptic number.

It is an amenable number.

22397913 is a deficient number, since it is larger than the sum of its proper divisors (10829515).

22397913 is a wasteful number, since it uses less digits than its factorization.

22397913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67304 (or 67301 counting only the distinct ones).

The product of its digits is 20412, while the sum is 36.

The square root of 22397913 is about 4732.6433417277. The cubic root of 22397913 is about 281.8831944199.

The spelling of 22397913 in words is "twenty-two million, three hundred ninety-seven thousand, nine hundred thirteen".