22717997 has 4 divisors (see below), whose sum is σ = 23705760. Its totient is φ = 21730236.

The previous prime is 22717987. The next prime is 22717999. The reversal of 22717997 is 79971722.

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.

It is a cyclic number.

It is not a de Polignac number, because 22717997 - 2¹⁰ = 22716973 is a prime.

It is a super-2 number, since 2×22717997² = 1032214775384018, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22717999) 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, 493847 + ... + 493892.

It is an arithmetic number, because the mean of its divisors is an integer number (5926440).

Almost surely, 2^22717997 is an apocalyptic number.

It is an amenable number.

22717997 is a deficient number, since it is larger than the sum of its proper divisors (987763).

22717997 is an equidigital number, since it uses as much as digits as its factorization.

22717997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 987762.

The product of its digits is 111132, while the sum is 44.

The square root of 22717997 is about 4766.3400004616. The cubic root of 22717997 is about 283.2196266535.

The spelling of 22717997 in words is "twenty-two million, seven hundred seventeen thousand, nine hundred ninety-seven".