22747891 has 4 divisors (see below), whose sum is σ = 22914072. Its totient is φ = 22581712.

The previous prime is 22747867. The next prime is 22747931. The reversal of 22747891 is 19874722.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 22747891 - 2⁷ = 22747763 is a prime.

It is not an unprimeable number, because it can be changed into a prime (22747801) 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, 82885 + ... + 83158.

It is an arithmetic number, because the mean of its divisors is an integer number (5728518).

Almost surely, 2^22747891 is an apocalyptic number.

22747891 is a deficient number, since it is larger than the sum of its proper divisors (166181).

22747891 is a wasteful number, since it uses less digits than its factorization.

22747891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 166180.

The product of its digits is 56448, while the sum is 40.

The square root of 22747891 is about 4769.4749186886. The cubic root of 22747891 is about 283.3437992289.

The spelling of 22747891 in words is "twenty-two million, seven hundred forty-seven thousand, eight hundred ninety-one".