22708723 has 4 divisors (see below), whose sum is σ = 22799448. Its totient is φ = 22618000.

The previous prime is 22708703. The next prime is 22708727. The reversal of 22708723 is 32780722.

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 22708723 - 2²¹ = 20611571 is a prime.

It is a super-2 number, since 2×22708723² = 1031372200581458, which contains 22 as substring.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22708727) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44986 + ... + 45487.

It is an arithmetic number, because the mean of its divisors is an integer number (5699862).

Almost surely, 2^22708723 is an apocalyptic number.

22708723 is a deficient number, since it is larger than the sum of its proper divisors (90725).

22708723 is an equidigital number, since it uses as much as digits as its factorization.

22708723 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90724.

The product of its (nonzero) digits is 9408, while the sum is 31.

The square root of 22708723 is about 4765.3670372805. The cubic root of 22708723 is about 283.1810825232.

The spelling of 22708723 in words is "twenty-two million, seven hundred eight thousand, seven hundred twenty-three".