91967713 has 2 divisors, whose sum is σ = 91967714. Its totient is φ = 91967712.

The previous prime is 91967699. The next prime is 91967741. The reversal of 91967713 is 31776919.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 77580864 + 14386849 = 8808^2 + 3793^2 .

It is an emirp because it is prime and its reverse (31776919) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 91967713 - 2¹³ = 91959521 is a prime.

It is a super-3 number, since 3×91967713³ (a number of 25 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 91967713.

It is not a weakly prime, because it can be changed into another prime (91967753) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45983856 + 45983857.

It is an arithmetic number, because the mean of its divisors is an integer number (45983857).

Almost surely, 2^91967713 is an apocalyptic number.

It is an amenable number.

91967713 is a deficient number, since it is larger than the sum of its proper divisors (1).

91967713 is an equidigital number, since it uses as much as digits as its factorization.

91967713 is an evil number, because the sum of its binary digits is even.

The product of its digits is 71442, while the sum is 43.

The square root of 91967713 is about 9589.9798227108. The cubic root of 91967713 is about 451.3829275646.

The spelling of 91967713 in words is "ninety-one million, nine hundred sixty-seven thousand, seven hundred thirteen".