22897279 has 4 divisors (see below), whose sum is σ = 22944784. Its totient is φ = 22849776.

The previous prime is 22897241. The next prime is 22897289. The reversal of 22897279 is 97279822.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 97279822 = 2 ⋅48639911.

It is a cyclic number.

It is not a de Polignac number, because 22897279 - 2¹⁹ = 22372991 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22897289) 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, 23022 + ... + 23995.

It is an arithmetic number, because the mean of its divisors is an integer number (5736196).

Almost surely, 2^22897279 is an apocalyptic number.

22897279 is a deficient number, since it is larger than the sum of its proper divisors (47505).

22897279 is an equidigital number, since it uses as much as digits as its factorization.

22897279 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47504.

The product of its digits is 254016, while the sum is 46.

The square root of 22897279 is about 4785.1101345737. The cubic root of 22897279 is about 283.9626967800.

The spelling of 22897279 in words is "twenty-two million, eight hundred ninety-seven thousand, two hundred seventy-nine".