22397749 has 8 divisors (see below), whose sum is σ = 24468192. Its totient is φ = 20333040.

The previous prime is 22397743. The next prime is 22397759. The reversal of 22397749 is 94779322.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 22397749 - 2⁹ = 22397237 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 (22397743) 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 7 ways as a sum of consecutive naturals, for example, 14362 + ... + 15844.

It is an arithmetic number, because the mean of its divisors is an integer number (3058524).

Almost surely, 2^22397749 is an apocalyptic number.

It is an amenable number.

22397749 is a deficient number, since it is larger than the sum of its proper divisors (2070443).

22397749 is a wasteful number, since it uses less digits than its factorization.

22397749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2867.

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

The square root of 22397749 is about 4732.6260152266. The cubic root of 22397749 is about 281.8825064249.

The spelling of 22397749 in words is "twenty-two million, three hundred ninety-seven thousand, seven hundred forty-nine".