91087583 has 2 divisors, whose sum is σ = 91087584. Its totient is φ = 91087582.

The previous prime is 91087573. The next prime is 91087589. The reversal of 91087583 is 38578019.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (38578019) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 91087583 - 2⁶ = 91087519 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 91087583.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91087589) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45543791 + 45543792.

It is an arithmetic number, because the mean of its divisors is an integer number (45543792).

Almost surely, 2^91087583 is an apocalyptic number.

91087583 is a deficient number, since it is larger than the sum of its proper divisors (1).

91087583 is an equidigital number, since it uses as much as digits as its factorization.

91087583 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 60480, while the sum is 41.

The square root of 91087583 is about 9543.9815066879. The cubic root of 91087583 is about 449.9383997984.

The spelling of 91087583 in words is "ninety-one million, eighty-seven thousand, five hundred eighty-three".