22487939 has 2 divisors, whose sum is σ = 22487940. Its totient is φ = 22487938.

The previous prime is 22487921. The next prime is 22487981. The reversal of 22487939 is 93978422.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 22487939 - 2⁸ = 22487683 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 22487939.

It is not a weakly prime, because it can be changed into another prime (22487999) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11243969 + 11243970.

It is an arithmetic number, because the mean of its divisors is an integer number (11243970).

Almost surely, 2^22487939 is an apocalyptic number.

22487939 is a deficient number, since it is larger than the sum of its proper divisors (1).

22487939 is an equidigital number, since it uses as much as digits as its factorization.

22487939 is an evil number, because the sum of its binary digits is even.

The product of its digits is 217728, while the sum is 44.

The square root of 22487939 is about 4742.1449788044. The cubic root of 22487939 is about 282.2603559347.

The spelling of 22487939 in words is "twenty-two million, four hundred eighty-seven thousand, nine hundred thirty-nine".