22397493 has 4 divisors (see below), whose sum is σ = 29863328. Its totient is φ = 14931660.

The previous prime is 22397491. The next prime is 22397509. The reversal of 22397493 is 39479322.

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 not a de Polignac number, because 22397493 - 2¹ = 22397491 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent 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 3 ways as a sum of consecutive naturals, for example, 3732913 + ... + 3732918.

It is an arithmetic number, because the mean of its divisors is an integer number (7465832).

Almost surely, 2^22397493 is an apocalyptic number.

It is an amenable number.

22397493 is a deficient number, since it is larger than the sum of its proper divisors (7465835).

22397493 is an equidigital number, since it uses as much as digits as its factorization.

22397493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7465834.

The product of its digits is 81648, while the sum is 39.

The square root of 22397493 is about 4732.5989688542. The cubic root of 22397493 is about 281.8814324748.

The spelling of 22397493 in words is "twenty-two million, three hundred ninety-seven thousand, four hundred ninety-three".