22991593 has 2 divisors, whose sum is σ = 22991594. Its totient is φ = 22991592.

The previous prime is 22991567. The next prime is 22991621. The reversal of 22991593 is 39519922.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11614464 + 11377129 = 3408^2 + 3373^2 .

It is a cyclic number.

It is not a de Polignac number, because 22991593 - 2⁹ = 22991081 is a prime.

It is a super-2 number, since 2×22991593² = 1057226697355298, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (22991503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11495796 + 11495797.

It is an arithmetic number, because the mean of its divisors is an integer number (11495797).

Almost surely, 2^22991593 is an apocalyptic number.

It is an amenable number.

22991593 is a deficient number, since it is larger than the sum of its proper divisors (1).

22991593 is an equidigital number, since it uses as much as digits as its factorization.

22991593 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 43740, while the sum is 40.

The square root of 22991593 is about 4794.9549528645. The cubic root of 22991593 is about 284.3520439224.

The spelling of 22991593 in words is "twenty-two million, nine hundred ninety-one thousand, five hundred ninety-three".