22613989 has 2 divisors, whose sum is σ = 22613990. Its totient is φ = 22613988.

The previous prime is 22613963. The next prime is 22614017. The reversal of 22613989 is 98931622.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21252100 + 1361889 = 4610^2 + 1167^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22613989 is a prime.

It is a super-2 number, since 2×22613989² = 1022784996984242, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22613489) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11306994 + 11306995.

It is an arithmetic number, because the mean of its divisors is an integer number (11306995).

Almost surely, 2^22613989 is an apocalyptic number.

It is an amenable number.

22613989 is a deficient number, since it is larger than the sum of its proper divisors (1).

22613989 is an equidigital number, since it uses as much as digits as its factorization.

22613989 is an evil number, because the sum of its binary digits is even.

The product of its digits is 46656, while the sum is 40.

The square root of 22613989 is about 4755.4168061275. The cubic root of 22613989 is about 282.7867514118.

The spelling of 22613989 in words is "twenty-two million, six hundred thirteen thousand, nine hundred eighty-nine".