22942991 has 4 divisors (see below), whose sum is σ = 22953984. Its totient is φ = 22932000.

The previous prime is 22942987. The next prime is 22942993. The reversal of 22942991 is 19924922.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 19924922 = 2 ⋅9962461.

It is a cyclic number.

It is not a de Polignac number, because 22942991 - 2² = 22942987 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 (22942993) 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, 1295 + ... + 6896.

It is an arithmetic number, because the mean of its divisors is an integer number (5738496).

Almost surely, 2^22942991 is an apocalyptic number.

22942991 is a deficient number, since it is larger than the sum of its proper divisors (10993).

22942991 is an equidigital number, since it uses as much as digits as its factorization.

22942991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10992.

The product of its digits is 23328, while the sum is 38.

The square root of 22942991 is about 4789.8842365970. The cubic root of 22942991 is about 284.1515383493.

The spelling of 22942991 in words is "twenty-two million, nine hundred forty-two thousand, nine hundred ninety-one".