91038671 has 16 divisors (see below), whose sum is σ = 98972160. Its totient is φ = 83462400.

The previous prime is 91038667. The next prime is 91038677. The reversal of 91038671 is 17683019.

It is a cyclic number.

It is not a de Polignac number, because 91038671 - 2² = 91038667 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 (91038677) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 86096 + ... + 87146.

It is an arithmetic number, because the mean of its divisors is an integer number (6185760).

Almost surely, 2^91038671 is an apocalyptic number.

91038671 is a deficient number, since it is larger than the sum of its proper divisors (7933489).

91038671 is a wasteful number, since it uses less digits than its factorization.

91038671 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1214.

The product of its (nonzero) digits is 9072, while the sum is 35.

The square root of 91038671 is about 9541.4187100242. The cubic root of 91038671 is about 449.8578497512.

The spelling of 91038671 in words is "ninety-one million, thirty-eight thousand, six hundred seventy-one".