91091363 has 8 divisors (see below), whose sum is σ = 99560640. Its totient is φ = 82653480.

The previous prime is 91091333. The next prime is 91091369. The reversal of 91091363 is 36319019.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 91091363 - 2¹⁰ = 91090339 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (91091369) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1553 + ... + 13586.

It is an arithmetic number, because the mean of its divisors is an integer number (12445080).

Almost surely, 2^91091363 is an apocalyptic number.

91091363 is a deficient number, since it is larger than the sum of its proper divisors (8469277).

91091363 is a wasteful number, since it uses less digits than its factorization.

91091363 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15697.

The product of its (nonzero) digits is 4374, while the sum is 32.

The square root of 91091363 is about 9544.1795351932. The cubic root of 91091363 is about 449.9446236384.

It can be divided in two parts, 91091 and 363, that multiplied together give a palindrome (33066033).

The spelling of 91091363 in words is "ninety-one million, ninety-one thousand, three hundred sixty-three".