91471355 has 4 divisors (see below), whose sum is σ = 109765632. Its totient is φ = 73177080.

The previous prime is 91471349. The next prime is 91471379. The reversal of 91471355 is 55317419.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 91471355 - 2¹⁴ = 91454971 is a prime.

It is a Duffinian 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, 9147131 + ... + 9147140.

It is an arithmetic number, because the mean of its divisors is an integer number (27441408).

Almost surely, 2^91471355 is an apocalyptic number.

91471355 is a deficient number, since it is larger than the sum of its proper divisors (18294277).

91471355 is a wasteful number, since it uses less digits than its factorization.

91471355 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18294276.

The product of its digits is 18900, while the sum is 35.

The square root of 91471355 is about 9564.0658195142. The cubic root of 91471355 is about 450.5694108750.

The spelling of 91471355 in words is "ninety-one million, four hundred seventy-one thousand, three hundred fifty-five".