91285963 has 2 divisors, whose sum is σ = 91285964. Its totient is φ = 91285962.

The previous prime is 91285933. The next prime is 91285969. The reversal of 91285963 is 36958219.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 91285963 - 2²¹ = 89188811 is a prime.

It is not a weakly prime, because it can be changed into another prime (91285969) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45642981 + 45642982.

It is an arithmetic number, because the mean of its divisors is an integer number (45642982).

Almost surely, 2^91285963 is an apocalyptic number.

91285963 is a deficient number, since it is larger than the sum of its proper divisors (1).

91285963 is an equidigital number, since it uses as much as digits as its factorization.

91285963 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 116640, while the sum is 43.

The square root of 91285963 is about 9554.3687912912. The cubic root of 91285963 is about 450.2648038156.

The spelling of 91285963 in words is "ninety-one million, two hundred eighty-five thousand, nine hundred sixty-three".