91065593 has 2 divisors, whose sum is σ = 91065594. Its totient is φ = 91065592.

The previous prime is 91065589. The next prime is 91065641. The reversal of 91065593 is 39556019.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 57274624 + 33790969 = 7568^2 + 5813^2 .

It is a cyclic number.

It is not a de Polignac number, because 91065593 - 2² = 91065589 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (91065503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45532796 + 45532797.

It is an arithmetic number, because the mean of its divisors is an integer number (45532797).

Almost surely, 2^91065593 is an apocalyptic number.

It is an amenable number.

91065593 is a deficient number, since it is larger than the sum of its proper divisors (1).

91065593 is an equidigital number, since it uses as much as digits as its factorization.

91065593 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36450, while the sum is 38.

The square root of 91065593 is about 9542.8294022266. The cubic root of 91065593 is about 449.9021894413.

The spelling of 91065593 in words is "ninety-one million, sixty-five thousand, five hundred ninety-three".