22745687 has 2 divisors, whose sum is σ = 22745688. Its totient is φ = 22745686.

The previous prime is 22745659. The next prime is 22745719. The reversal of 22745687 is 78654722.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 22745687 - 2²⁰ = 21697111 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22745287) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11372843 + 11372844.

It is an arithmetic number, because the mean of its divisors is an integer number (11372844).

Almost surely, 2^22745687 is an apocalyptic number.

22745687 is a deficient number, since it is larger than the sum of its proper divisors (1).

22745687 is an equidigital number, since it uses as much as digits as its factorization.

22745687 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 188160, while the sum is 41.

The square root of 22745687 is about 4769.2438604039. The cubic root of 22745687 is about 283.3346480523.

It can be divided in two parts, 22745 and 687, that added together give a palindrome (23432).

The spelling of 22745687 in words is "twenty-two million, seven hundred forty-five thousand, six hundred eighty-seven".