22949857 has 4 divisors (see below), whose sum is σ = 26228416. Its totient is φ = 19671300.

The previous prime is 22949851. The next prime is 22949863. The reversal of 22949857 is 75894922.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 75894922 = 2 ⋅37947461.

It is an interprime number because it is at equal distance from previous prime (22949851) and next prime (22949863).

It is a cyclic number.

It is not a de Polignac number, because 22949857 - 2¹¹ = 22947809 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22949851) 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, 1639269 + ... + 1639282.

It is an arithmetic number, because the mean of its divisors is an integer number (6557104).

Almost surely, 2^22949857 is an apocalyptic number.

It is an amenable number.

22949857 is a deficient number, since it is larger than the sum of its proper divisors (3278559).

22949857 is an equidigital number, since it uses as much as digits as its factorization.

22949857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3278558.

The product of its digits is 362880, while the sum is 46.

The square root of 22949857 is about 4790.6009017659. The cubic root of 22949857 is about 284.1798809177.

It can be divided in two parts, 229 and 49857, that added together give a triangular number (50086 = T₃₁₆).

The spelling of 22949857 in words is "twenty-two million, nine hundred forty-nine thousand, eight hundred fifty-seven".