22639423 has 2 divisors, whose sum is σ = 22639424. Its totient is φ = 22639422.

The previous prime is 22639403. The next prime is 22639433. The reversal of 22639423 is 32493622.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22639423 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22639403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11319711 + 11319712.

It is an arithmetic number, because the mean of its divisors is an integer number (11319712).

Almost surely, 2^22639423 is an apocalyptic number.

22639423 is a deficient number, since it is larger than the sum of its proper divisors (1).

22639423 is an equidigital number, since it uses as much as digits as its factorization.

22639423 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15552, while the sum is 31.

The square root of 22639423 is about 4758.0902681643. The cubic root of 22639423 is about 282.8927286380.

The spelling of 22639423 in words is "twenty-two million, six hundred thirty-nine thousand, four hundred twenty-three".