22029439 has 2 divisors, whose sum is σ = 22029440. Its totient is φ = 22029438.

The previous prime is 22029431. The next prime is 22029461. The reversal of 22029439 is 93492022.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 22029439 - 2³ = 22029431 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 22029439.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22029431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11014719 + 11014720.

It is an arithmetic number, because the mean of its divisors is an integer number (11014720).

Almost surely, 2^22029439 is an apocalyptic number.

22029439 is a deficient number, since it is larger than the sum of its proper divisors (1).

22029439 is an equidigital number, since it uses as much as digits as its factorization.

22029439 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 31.

The square root of 22029439 is about 4693.5529186321. The cubic root of 22029439 is about 280.3288610492.

The spelling of 22029439 in words is "twenty-two million, twenty-nine thousand, four hundred thirty-nine".