22745389 has 2 divisors, whose sum is σ = 22745390. Its totient is φ = 22745388.

The previous prime is 22745353. The next prime is 22745419. The reversal of 22745389 is 98354722.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13564489 + 9180900 = 3683^2 + 3030^2 .

It is a cyclic number.

It is not a de Polignac number, because 22745389 - 2²¹ = 20648237 is a prime.

It is a super-2 number, since 2×22745389² = 1034705441522642, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22745329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11372694 + 11372695.

It is an arithmetic number, because the mean of its divisors is an integer number (11372695).

Almost surely, 2^22745389 is an apocalyptic number.

It is an amenable number.

22745389 is a deficient number, since it is larger than the sum of its proper divisors (1).

22745389 is an equidigital number, since it uses as much as digits as its factorization.

22745389 is an evil number, because the sum of its binary digits is even.

The product of its digits is 120960, while the sum is 40.

The square root of 22745389 is about 4769.2126184518. The cubic root of 22745389 is about 283.3334106882. Note that the first 3 decimals are identical.

The spelling of 22745389 in words is "twenty-two million, seven hundred forty-five thousand, three hundred eighty-nine".