22939439 has 4 divisors (see below), whose sum is σ = 23162256. Its totient is φ = 22716624.

The previous prime is 22939391. The next prime is 22939451. The reversal of 22939439 is 93493922.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 93493922 = 2 ⋅46746961.

It is a cyclic number.

It is not a de Polignac number, because 22939439 - 2⁸ = 22939183 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22939396 and 22939405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22939489) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 111254 + ... + 111459.

It is an arithmetic number, because the mean of its divisors is an integer number (5790564).

Almost surely, 2^22939439 is an apocalyptic number.

22939439 is a deficient number, since it is larger than the sum of its proper divisors (222817).

22939439 is a wasteful number, since it uses less digits than its factorization.

22939439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 222816.

The product of its digits is 104976, while the sum is 41.

The square root of 22939439 is about 4789.5134408414. The cubic root of 22939439 is about 284.1368736186.

The spelling of 22939439 in words is "twenty-two million, nine hundred thirty-nine thousand, four hundred thirty-nine".