91419691 has 16 divisors (see below), whose sum is σ = 101973888. Its totient is φ = 81259200.

The previous prime is 91419649. The next prime is 91419701. The reversal of 91419691 is 19691419.

It is not a de Polignac number, because 91419691 - 2¹¹ = 91417643 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (91419191) by changing a digit.

It is an upside-down number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 119751 + ... + 120511.

It is an arithmetic number, because the mean of its divisors is an integer number (6373368).

Almost surely, 2^91419691 is an apocalyptic number.

91419691 is a deficient number, since it is larger than the sum of its proper divisors (10554197).

91419691 is a wasteful number, since it uses less digits than its factorization.

91419691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1002.

The product of its digits is 17496, while the sum is 40.

The square root of 91419691 is about 9561.3644946733. The cubic root of 91419691 is about 450.4845660912.

The spelling of 91419691 in words is "ninety-one million, four hundred nineteen thousand, six hundred ninety-one".