91448473 has 2 divisors, whose sum is σ = 91448474. Its totient is φ = 91448472.

The previous prime is 91448453. The next prime is 91448537. The reversal of 91448473 is 37484419.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 72369049 + 19079424 = 8507^2 + 4368^2 .

It is a cyclic number.

It is not a de Polignac number, because 91448473 - 2²¹ = 89351321 is a prime.

It is not a weakly prime, because it can be changed into another prime (91448443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45724236 + 45724237.

It is an arithmetic number, because the mean of its divisors is an integer number (45724237).

Almost surely, 2^91448473 is an apocalyptic number.

It is an amenable number.

91448473 is a deficient number, since it is larger than the sum of its proper divisors (1).

91448473 is an equidigital number, since it uses as much as digits as its factorization.

91448473 is an evil number, because the sum of its binary digits is even.

The product of its digits is 96768, while the sum is 40.

The square root of 91448473 is about 9562.8694961293. The cubic root of 91448473 is about 450.5318370390.

The spelling of 91448473 in words is "ninety-one million, four hundred forty-eight thousand, four hundred seventy-three".