91044671 has 4 divisors (see below), whose sum is σ = 91074000. Its totient is φ = 91015344.

The previous prime is 91044661. The next prime is 91044683. The reversal of 91044671 is 17644019.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 17644019 = 373 ⋅47303.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-91044671 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91044661) 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, 9371 + ... + 16428.

It is an arithmetic number, because the mean of its divisors is an integer number (22768500).

Almost surely, 2^91044671 is an apocalyptic number.

91044671 is a deficient number, since it is larger than the sum of its proper divisors (29329).

91044671 is a wasteful number, since it uses less digits than its factorization.

91044671 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29328.

The product of its (nonzero) digits is 6048, while the sum is 32.

The square root of 91044671 is about 9541.7331234949. The cubic root of 91044671 is about 449.8677323200.

The spelling of 91044671 in words is "ninety-one million, forty-four thousand, six hundred seventy-one".