91354813 has 16 divisors (see below), whose sum is σ = 102972096. Its totient is φ = 80317440.

The previous prime is 91354807. The next prime is 91354819. The reversal of 91354813 is 31845319.

It is an interprime number because it is at equal distance from previous prime (91354807) and next prime (91354819).

It is a cyclic number.

It is not a de Polignac number, because 91354813 - 2⁹ = 91354301 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91354819) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 77970 + ... + 79132.

It is an arithmetic number, because the mean of its divisors is an integer number (6435756).

Almost surely, 2^91354813 is an apocalyptic number.

It is an amenable number.

91354813 is a deficient number, since it is larger than the sum of its proper divisors (11617283).

91354813 is a wasteful number, since it uses less digits than its factorization.

91354813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1404.

The product of its digits is 12960, while the sum is 34.

The square root of 91354813 is about 9557.9711759348. The cubic root of 91354813 is about 450.3779754365.

The spelling of 91354813 in words is "ninety-one million, three hundred fifty-four thousand, eight hundred thirteen".