22807997 has 4 divisors (see below), whose sum is σ = 22881180. Its totient is φ = 22734816.

The previous prime is 22807957. The next prime is 22808003. The reversal of 22807997 is 79970822.

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

It can be written as a sum of positive squares in 2 ways, for example, as 6895876 + 15912121 = 2626^2 + 3989^2 .

It is a cyclic number.

It is not a de Polignac number, because 22807997 - 2⁶ = 22807933 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 (22807907) 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, 36122 + ... + 36747.

It is an arithmetic number, because the mean of its divisors is an integer number (5720295).

Almost surely, 2^22807997 is an apocalyptic number.

It is an amenable number.

22807997 is a deficient number, since it is larger than the sum of its proper divisors (73183).

22807997 is an equidigital number, since it uses as much as digits as its factorization.

22807997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73182.

The product of its (nonzero) digits is 127008, while the sum is 44.

The square root of 22807997 is about 4775.7718747863. The cubic root of 22807997 is about 283.5931364023.

The spelling of 22807997 in words is "twenty-two million, eight hundred seven thousand, nine hundred ninety-seven".