91585723 has 2 divisors, whose sum is σ = 91585724. Its totient is φ = 91585722.

The previous prime is 91585699. The next prime is 91585777. The reversal of 91585723 is 32758519.

It is a weak prime.

It is an emirp because it is prime and its reverse (32758519) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 91585723 - 2¹⁷ = 91454651 is a prime.

It is not a weakly prime, because it can be changed into another prime (91586723) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45792861 + 45792862.

It is an arithmetic number, because the mean of its divisors is an integer number (45792862).

Almost surely, 2^91585723 is an apocalyptic number.

91585723 is a deficient number, since it is larger than the sum of its proper divisors (1).

91585723 is an equidigital number, since it uses as much as digits as its factorization.

91585723 is an evil number, because the sum of its binary digits is even.

The product of its digits is 75600, while the sum is 40.

The square root of 91585723 is about 9570.0429988585. The cubic root of 91585723 is about 450.7571172185.

The spelling of 91585723 in words is "ninety-one million, five hundred eighty-five thousand, seven hundred twenty-three".