91713261 has 4 divisors (see below), whose sum is σ = 122284352. Its totient is φ = 61142172.

The previous prime is 91713241. The next prime is 91713299. The reversal of 91713261 is 16231719.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 91713261 - 2⁵ = 91713229 is a prime.

It is a super-2 number, since 2×91713261² = 16822644486508242, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91713211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15285541 + ... + 15285546.

It is an arithmetic number, because the mean of its divisors is an integer number (30571088).

Almost surely, 2^91713261 is an apocalyptic number.

It is an amenable number.

91713261 is a deficient number, since it is larger than the sum of its proper divisors (30571091).

91713261 is a wasteful number, since it uses less digits than its factorization.

91713261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30571090.

The product of its digits is 2268, while the sum is 30.

The square root of 91713261 is about 9576.7040781263. The cubic root of 91713261 is about 450.9662546059.

The spelling of 91713261 in words is "ninety-one million, seven hundred thirteen thousand, two hundred sixty-one".