91013111 has 8 divisors (see below), whose sum is σ = 104079360. Its totient is φ = 77962968.

The previous prime is 91013099. The next prime is 91013113. The reversal of 91013111 is 11131019.

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

It is a cyclic number.

It is not a de Polignac number, because 91013111 - 2¹⁸ = 90750967 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 91013111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91013113) 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, 12770 + ... + 18576.

It is an arithmetic number, because the mean of its divisors is an integer number (13009920).

Almost surely, 2^91013111 is an apocalyptic number.

91013111 is a deficient number, since it is larger than the sum of its proper divisors (13066249).

91013111 is a wasteful number, since it uses less digits than its factorization.

91013111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8053.

The product of its (nonzero) digits is 27, while the sum is 17.

The square root of 91013111 is about 9540.0791925434. The cubic root of 91013111 is about 449.8157451423.

The spelling of 91013111 in words is "ninety-one million, thirteen thousand, one hundred eleven".