22089091 has 2 divisors, whose sum is σ = 22089092. Its totient is φ = 22089090.

The previous prime is 22089083. The next prime is 22089113. The reversal of 22089091 is 19098022.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 22089091 - 2³ = 22089083 is a prime.

It is a super-3 number, since 3×22089091³ (a number of 23 digits) contains 333 as substring.

It is equal to p_1394509 and since 22089091 and 1394509 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (22089791) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11044545 + 11044546.

It is an arithmetic number, because the mean of its divisors is an integer number (11044546).

Almost surely, 2^22089091 is an apocalyptic number.

22089091 is a deficient number, since it is larger than the sum of its proper divisors (1).

22089091 is an equidigital number, since it uses as much as digits as its factorization.

22089091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2592, while the sum is 31.

The square root of 22089091 is about 4699.9032968775. The cubic root of 22089091 is about 280.5816607426.

The spelling of 22089091 in words is "twenty-two million, eighty-nine thousand, ninety-one".