91141597 has 2 divisors, whose sum is σ = 91141598. Its totient is φ = 91141596.

The previous prime is 91141591. The next prime is 91141627. The reversal of 91141597 is 79514119.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 87497316 + 3644281 = 9354^2 + 1909^2 .

It is an emirp because it is prime and its reverse (79514119) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 91141597 - 2⁷ = 91141469 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91141591) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45570798 + 45570799.

It is an arithmetic number, because the mean of its divisors is an integer number (45570799).

Almost surely, 2^91141597 is an apocalyptic number.

It is an amenable number.

91141597 is a deficient number, since it is larger than the sum of its proper divisors (1).

91141597 is an equidigital number, since it uses as much as digits as its factorization.

91141597 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11340, while the sum is 37.

The square root of 91141597 is about 9546.8108287532. The cubic root of 91141597 is about 450.0273185061.

The spelling of 91141597 in words is "ninety-one million, one hundred forty-one thousand, five hundred ninety-seven".