22981939 has 2 divisors, whose sum is σ = 22981940. Its totient is φ = 22981938.

The previous prime is 22981927. The next prime is 22981957. The reversal of 22981939 is 93918922.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22981939 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 22981895 and 22981904.

It is not a weakly prime, because it can be changed into another prime (22951939) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11490969 + 11490970.

It is an arithmetic number, because the mean of its divisors is an integer number (11490970).

Almost surely, 2^22981939 is an apocalyptic number.

22981939 is a deficient number, since it is larger than the sum of its proper divisors (1).

22981939 is an equidigital number, since it uses as much as digits as its factorization.

22981939 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 69984, while the sum is 43.

The square root of 22981939 is about 4793.9481640919. The cubic root of 22981939 is about 284.3122392433.

The spelling of 22981939 in words is "twenty-two million, nine hundred eighty-one thousand, nine hundred thirty-nine".