91459481 has 4 divisors (see below), whose sum is σ = 91964964. Its totient is φ = 90954000.

The previous prime is 91459471. The next prime is 91459547. The reversal of 91459481 is 18495419.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 18495419 = 1151 ⋅16069.

It can be written as a sum of positive squares in 2 ways, for example, as 15054400 + 76405081 = 3880^2 + 8741^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-91459481 is a prime.

It is a super-2 number, since 2×91459481² = 16729673329578722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (91459411) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 252470 + ... + 252831.

It is an arithmetic number, because the mean of its divisors is an integer number (22991241).

Almost surely, 2^91459481 is an apocalyptic number.

It is an amenable number.

91459481 is a deficient number, since it is larger than the sum of its proper divisors (505483).

91459481 is a wasteful number, since it uses less digits than its factorization.

91459481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 505482.

The product of its digits is 51840, while the sum is 41.

The square root of 91459481 is about 9563.4450382694. The cubic root of 91459481 is about 450.5499137232.

The spelling of 91459481 in words is "ninety-one million, four hundred fifty-nine thousand, four hundred eighty-one".