22920091 has 2 divisors, whose sum is σ = 22920092. Its totient is φ = 22920090.

The previous prime is 22920089. The next prime is 22920109. The reversal of 22920091 is 19002922.

Together with next prime (22920109) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 22920091 - 2¹ = 22920089 is a prime.

Together with 22920089, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (22900091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11460045 + 11460046.

It is an arithmetic number, because the mean of its divisors is an integer number (11460046).

Almost surely, 2^22920091 is an apocalyptic number.

22920091 is a deficient number, since it is larger than the sum of its proper divisors (1).

22920091 is an equidigital number, since it uses as much as digits as its factorization.

22920091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 648, while the sum is 25.

The square root of 22920091 is about 4787.4931853737. The cubic root of 22920091 is about 284.0569671810.

The spelling of 22920091 in words is "twenty-two million, nine hundred twenty thousand, ninety-one".