91961299 has 2 divisors, whose sum is σ = 91961300. Its totient is φ = 91961298.

The previous prime is 91961267. The next prime is 91961323. The reversal of 91961299 is 99216919.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 91961299 - 2⁵ = 91961267 is a prime.

It is a super-3 number, since 3×91961299³ (a number of 25 digits) contains 333 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (91961599) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45980649 + 45980650.

It is an arithmetic number, because the mean of its divisors is an integer number (45980650).

Almost surely, 2^91961299 is an apocalyptic number.

91961299 is a deficient number, since it is larger than the sum of its proper divisors (1).

91961299 is an equidigital number, since it uses as much as digits as its factorization.

91961299 is an evil number, because the sum of its binary digits is even.

The product of its digits is 78732, while the sum is 46.

The square root of 91961299 is about 9589.6454053317. The cubic root of 91961299 is about 451.3724338913.

The spelling of 91961299 in words is "ninety-one million, nine hundred sixty-one thousand, two hundred ninety-nine".