91488623 has 2 divisors, whose sum is σ = 91488624. Its totient is φ = 91488622.

The previous prime is 91488619. The next prime is 91488647. The reversal of 91488623 is 32688419.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 91488623 - 2² = 91488619 is a prime.

It is a super-2 number, since 2×91488623² = 16740336276872258, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91488613) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45744311 + 45744312.

It is an arithmetic number, because the mean of its divisors is an integer number (45744312).

Almost surely, 2^91488623 is an apocalyptic number.

91488623 is a deficient number, since it is larger than the sum of its proper divisors (1).

91488623 is an equidigital number, since it uses as much as digits as its factorization.

91488623 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 82944, while the sum is 41.

The square root of 91488623 is about 9564.9685310512. The cubic root of 91488623 is about 450.5977619839.

It can be divided in two parts, 9148 and 8623, that added together give a palindrome (17771).

The spelling of 91488623 in words is "ninety-one million, four hundred eighty-eight thousand, six hundred twenty-three".