22397497 has 8 divisors (see below), whose sum is σ = 22820256. Its totient is φ = 21977472.

The previous prime is 22397491. The next prime is 22397509. The reversal of 22397497 is 79479322.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a 3-Lehmer number, since φ(22397497) divides (22397497-1)³.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22397497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22397491) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23178 + ... + 24124.

It is an arithmetic number, because the mean of its divisors is an integer number (2852532).

It is a Poulet number, since it divides 2^22397496-1.

Almost surely, 2^22397497 is an apocalyptic number.

It is an amenable number.

22397497 is a deficient number, since it is larger than the sum of its proper divisors (422759).

22397497 is an equidigital number, since it uses as much as digits as its factorization.

22397497 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1367.

The product of its digits is 190512, while the sum is 43.

The square root of 22397497 is about 4732.5993914550. The cubic root of 22397497 is about 281.8814492553.

The spelling of 22397497 in words is "twenty-two million, three hundred ninety-seven thousand, four hundred ninety-seven".