91713241 has 2 divisors, whose sum is σ = 91713242. Its totient is φ = 91713240.

The previous prime is 91713239. The next prime is 91713299. The reversal of 91713241 is 14231719.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 64464841 + 27248400 = 8029^2 + 5220^2 .

It is a cyclic number.

It is not a de Polignac number, because 91713241 - 2¹ = 91713239 is a prime.

It is a super-2 number, since 2×91713241² = 16822637149448162, which contains 22 as substring.

Together with 91713239, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (91713211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45856620 + 45856621.

It is an arithmetic number, because the mean of its divisors is an integer number (45856621).

Almost surely, 2^91713241 is an apocalyptic number.

It is an amenable number.

91713241 is a deficient number, since it is larger than the sum of its proper divisors (1).

91713241 is an equidigital number, since it uses as much as digits as its factorization.

91713241 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1512, while the sum is 28.

The square root of 91713241 is about 9576.7030339256. The cubic root of 91713241 is about 450.9662218251.

The spelling of 91713241 in words is "ninety-one million, seven hundred thirteen thousand, two hundred forty-one".