91967273 has 2 divisors, whose sum is σ = 91967274. Its totient is φ = 91967272.

The previous prime is 91967261. The next prime is 91967327. The reversal of 91967273 is 37276919.

It is a happy number.

Together with next prime (91967327) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 86359849 + 5607424 = 9293^2 + 2368^2 .

It is a cyclic number.

It is not a de Polignac number, because 91967273 - 2⁶ = 91967209 is a prime.

It is a super-3 number, since 3×91967273³ (a number of 25 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (91967233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45983636 + 45983637.

It is an arithmetic number, because the mean of its divisors is an integer number (45983637).

Almost surely, 2^91967273 is an apocalyptic number.

It is an amenable number.

91967273 is a deficient number, since it is larger than the sum of its proper divisors (1).

91967273 is an equidigital number, since it uses as much as digits as its factorization.

91967273 is an evil number, because the sum of its binary digits is even.

The product of its digits is 142884, while the sum is 44.

The square root of 91967273 is about 9589.9568820720. The cubic root of 91967273 is about 451.3822077148.

The spelling of 91967273 in words is "ninety-one million, nine hundred sixty-seven thousand, two hundred seventy-three".