91290241 has 4 divisors (see below), whose sum is σ = 104331712. Its totient is φ = 78248772.

The previous prime is 91290217. The next prime is 91290253. The reversal of 91290241 is 14209219.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 91290241 - 2⁵ = 91290209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (91290271) 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 in 3 ways as a sum of consecutive naturals, for example, 6520725 + ... + 6520738.

It is an arithmetic number, because the mean of its divisors is an integer number (26082928).

Almost surely, 2^91290241 is an apocalyptic number.

It is an amenable number.

91290241 is a deficient number, since it is larger than the sum of its proper divisors (13041471).

91290241 is a wasteful number, since it uses less digits than its factorization.

91290241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13041470.

The product of its (nonzero) digits is 1296, while the sum is 28.

The square root of 91290241 is about 9554.5926653102. The cubic root of 91290241 is about 450.2718374006.

The spelling of 91290241 in words is "ninety-one million, two hundred ninety thousand, two hundred forty-one".