91419655 has 4 divisors (see below), whose sum is σ = 109703592. Its totient is φ = 73135720.

The previous prime is 91419649. The next prime is 91419701. The reversal of 91419655 is 55691419.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 55691419 = 7 ⋅7955917.

It is a de Polignac number, because none of the positive numbers 2^k-91419655 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9141961 + ... + 9141970.

It is an arithmetic number, because the mean of its divisors is an integer number (27425898).

Almost surely, 2^91419655 is an apocalyptic number.

91419655 is a deficient number, since it is larger than the sum of its proper divisors (18283937).

91419655 is a wasteful number, since it uses less digits than its factorization.

91419655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18283936.

The product of its digits is 48600, while the sum is 40.

The square root of 91419655 is about 9561.3626120967. The cubic root of 91419655 is about 450.4845069594.

The spelling of 91419655 in words is "ninety-one million, four hundred nineteen thousand, six hundred fifty-five".