91814455 has 16 divisors (see below), whose sum is σ = 113680224. Its totient is φ = 71153280.

The previous prime is 91814389. The next prime is 91814461. The reversal of 91814455 is 55441819.

It is not a de Polignac number, because 91814455 - 2¹³ = 91806263 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18189 + ... + 22681.

It is an arithmetic number, because the mean of its divisors is an integer number (7105014).

Almost surely, 2^91814455 is an apocalyptic number.

91814455 is a deficient number, since it is larger than the sum of its proper divisors (21865769).

91814455 is a wasteful number, since it uses less digits than its factorization.

91814455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4626.

The product of its digits is 28800, while the sum is 37.

The square root of 91814455 is about 9581.9859632542. The cubic root of 91814455 is about 451.1320550757.

The spelling of 91814455 in words is "ninety-one million, eight hundred fourteen thousand, four hundred fifty-five".