22893991 has 2 divisors, whose sum is σ = 22893992. Its totient is φ = 22893990.

The previous prime is 22893989. The next prime is 22894007. The reversal of 22893991 is 19939822.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 22893991 - 2¹ = 22893989 is a prime.

Together with 22893989, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22093991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11446995 + 11446996.

It is an arithmetic number, because the mean of its divisors is an integer number (11446996).

Almost surely, 2^22893991 is an apocalyptic number.

22893991 is a deficient number, since it is larger than the sum of its proper divisors (1).

22893991 is an equidigital number, since it uses as much as digits as its factorization.

22893991 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 69984, while the sum is 43.

The square root of 22893991 is about 4784.7665564790. The cubic root of 22893991 is about 283.9491039853.

The spelling of 22893991 in words is "twenty-two million, eight hundred ninety-three thousand, nine hundred ninety-one".