22639403 has 2 divisors, whose sum is σ = 22639404. Its totient is φ = 22639402.

The previous prime is 22639399. The next prime is 22639423. The reversal of 22639403 is 30493622.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 22639403 - 2² = 22639399 is a prime.

It is not a weakly prime, because it can be changed into another prime (22639423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11319701 + 11319702.

It is an arithmetic number, because the mean of its divisors is an integer number (11319702).

Almost surely, 2^22639403 is an apocalyptic number.

22639403 is a deficient number, since it is larger than the sum of its proper divisors (1).

22639403 is an equidigital number, since it uses as much as digits as its factorization.

22639403 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7776, while the sum is 29.

The square root of 22639403 is about 4758.0881664803. The cubic root of 22639403 is about 282.8926453341.

The spelling of 22639403 in words is "twenty-two million, six hundred thirty-nine thousand, four hundred three".