91117039 has 16 divisors (see below), whose sum is σ = 99742720. Its totient is φ = 82736640.

The previous prime is 91117001. The next prime is 91117073. The reversal of 91117039 is 93071119.

It is a cyclic number.

It is not a de Polignac number, because 91117039 - 2¹⁹ = 90592751 is a prime.

It is a super-2 number, since 2×91117039² = 16604629592255042, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 91117039.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91117079) 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, 377959 + ... + 378199.

It is an arithmetic number, because the mean of its divisors is an integer number (6233920).

Almost surely, 2^91117039 is an apocalyptic number.

91117039 is a deficient number, since it is larger than the sum of its proper divisors (8625681).

91117039 is a wasteful number, since it uses less digits than its factorization.

91117039 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 610.

The product of its (nonzero) digits is 1701, while the sum is 31.

The square root of 91117039 is about 9545.5245534229. The cubic root of 91117039 is about 449.9868950916.

The spelling of 91117039 in words is "ninety-one million, one hundred seventeen thousand, thirty-nine".