22479913 has 2 divisors, whose sum is σ = 22479914. Its totient is φ = 22479912.

The previous prime is 22479911. The next prime is 22479917. The reversal of 22479913 is 31997422.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20820969 + 1658944 = 4563^2 + 1288^2 .

It is a cyclic number.

It is not a de Polignac number, because 22479913 - 2¹ = 22479911 is a prime.

Together with 22479911, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (22479911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11239956 + 11239957.

It is an arithmetic number, because the mean of its divisors is an integer number (11239957).

Almost surely, 2^22479913 is an apocalyptic number.

It is an amenable number.

22479913 is a deficient number, since it is larger than the sum of its proper divisors (1).

22479913 is an equidigital number, since it uses as much as digits as its factorization.

22479913 is an evil number, because the sum of its binary digits is even.

The product of its digits is 27216, while the sum is 37.

The square root of 22479913 is about 4741.2986617592. The cubic root of 22479913 is about 282.2267721370.

The spelling of 22479913 in words is "twenty-two million, four hundred seventy-nine thousand, nine hundred thirteen".