91040547 has 8 divisors (see below), whose sum is σ = 130724944. Its totient is φ = 56024928.

The previous prime is 91040527. The next prime is 91040549. The reversal of 91040547 is 74504019.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 91040547 - 2⁸ = 91040291 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (91040549) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1167148 + ... + 1167225.

It is an arithmetic number, because the mean of its divisors is an integer number (16340618).

Almost surely, 2^91040547 is an apocalyptic number.

91040547 is a deficient number, since it is larger than the sum of its proper divisors (39684397).

91040547 is a wasteful number, since it uses less digits than its factorization.

91040547 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2334389.

The product of its (nonzero) digits is 5040, while the sum is 30.

The square root of 91040547 is about 9541.5170177493. The cubic root of 91040547 is about 449.8609397477.

The spelling of 91040547 in words is "ninety-one million, forty thousand, five hundred forty-seven".