91671355 has 4 divisors (see below), whose sum is σ = 110005632. Its totient is φ = 73337080.

The previous prime is 91671347. The next prime is 91671379. The reversal of 91671355 is 55317619.

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

It is not a de Polignac number, because 91671355 - 2³ = 91671347 is a prime.

It is a Duffinian 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 3 ways as a sum of consecutive naturals, for example, 9167131 + ... + 9167140.

It is an arithmetic number, because the mean of its divisors is an integer number (27501408).

Almost surely, 2^91671355 is an apocalyptic number.

91671355 is a deficient number, since it is larger than the sum of its proper divisors (18334277).

91671355 is a wasteful number, since it uses less digits than its factorization.

91671355 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18334276.

The product of its digits is 28350, while the sum is 37.

The square root of 91671355 is about 9574.5159146559. The cubic root of 91671355 is about 450.8975583573.

The spelling of 91671355 in words is "ninety-one million, six hundred seventy-one thousand, three hundred fifty-five".