22909393 has 4 divisors (see below), whose sum is σ = 24671668. Its totient is φ = 21147120.

The previous prime is 22909373. The next prime is 22909399. The reversal of 22909393 is 39390922.

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 13373649 + 9535744 = 3657^2 + 3088^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22909393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22909399) 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, 881118 + ... + 881143.

It is an arithmetic number, because the mean of its divisors is an integer number (6167917).

Almost surely, 2^22909393 is an apocalyptic number.

It is an amenable number.

22909393 is a deficient number, since it is larger than the sum of its proper divisors (1762275).

22909393 is a wasteful number, since it uses less digits than its factorization.

22909393 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1762274.

The product of its (nonzero) digits is 26244, while the sum is 37.

The square root of 22909393 is about 4786.3757687837. The cubic root of 22909393 is about 284.0127655771.

The spelling of 22909393 in words is "twenty-two million, nine hundred nine thousand, three hundred ninety-three".