91458081 has 48 divisors (see below), whose sum is σ = 156461760. Its totient is φ = 50751360.

The previous prime is 91458071. The next prime is 91458089. The reversal of 91458081 is 18085419.

It is not a de Polignac number, because 91458081 - 2¹⁰ = 91457057 is a prime.

It is a super-2 number, since 2×91458081² = 16729161160405122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (91458089) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 230175 + ... + 230571.

It is an arithmetic number, because the mean of its divisors is an integer number (3259620).

Almost surely, 2^91458081 is an apocalyptic number.

It is an amenable number.

91458081 is a deficient number, since it is larger than the sum of its proper divisors (65003679).

91458081 is a wasteful number, since it uses less digits than its factorization.

91458081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 606 (or 603 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 36.

The square root of 91458081 is about 9563.3718426087. The cubic root of 91458081 is about 450.5476148068.

The spelling of 91458081 in words is "ninety-one million, four hundred fifty-eight thousand, eighty-one".