22991939 has 8 divisors (see below), whose sum is σ = 24938928. Its totient is φ = 21111040.

The previous prime is 22991933. The next prime is 22991951. The reversal of 22991939 is 93919922.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22991939 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 22991939.

It is not an unprimeable number, because it can be changed into a prime (22991933) 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, 15797 + ... + 17190.

It is an arithmetic number, because the mean of its divisors is an integer number (3117366).

Almost surely, 2^22991939 is an apocalyptic number.

22991939 is a deficient number, since it is larger than the sum of its proper divisors (1946989).

22991939 is a wasteful number, since it uses less digits than its factorization.

22991939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33045.

The product of its digits is 78732, while the sum is 44.

The square root of 22991939 is about 4794.9910323170. The cubic root of 22991939 is about 284.3534703179.

The spelling of 22991939 in words is "twenty-two million, nine hundred ninety-one thousand, nine hundred thirty-nine".