91411567 has 24 divisors (see below), whose sum is σ = 108309600. Its totient is φ = 76586496.

The previous prime is 91411561. The next prime is 91411583. The reversal of 91411567 is 76511419.

It is not a de Polignac number, because 91411567 - 2¹⁵ = 91378799 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 (91411561) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 108534 + ... + 109372.

It is an arithmetic number, because the mean of its divisors is an integer number (4512900).

Almost surely, 2^91411567 is an apocalyptic number.

91411567 is a deficient number, since it is larger than the sum of its proper divisors (16898033).

91411567 is a wasteful number, since it uses less digits than its factorization.

91411567 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 915 (or 898 counting only the distinct ones).

The product of its digits is 7560, while the sum is 34.

The square root of 91411567 is about 9560.9396504737. The cubic root of 91411567 is about 450.4712216101.

The spelling of 91411567 in words is "ninety-one million, four hundred eleven thousand, five hundred sixty-seven".