91967377 has 2 divisors, whose sum is σ = 91967378. Its totient is φ = 91967376.

The previous prime is 91967341. The next prime is 91967383. The reversal of 91967377 is 77376919.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 88284816 + 3682561 = 9396^2 + 1919^2 .

It is an emirp because it is prime and its reverse (77376919) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 91967377 - 2¹¹ = 91965329 is a prime.

It is a super-3 number, since 3×91967377³ (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 91967377.

It is not a weakly prime, because it can be changed into another prime (91967327) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45983688 + 45983689.

It is an arithmetic number, because the mean of its divisors is an integer number (45983689).

Almost surely, 2^91967377 is an apocalyptic number.

It is an amenable number.

91967377 is a deficient number, since it is larger than the sum of its proper divisors (1).

91967377 is an equidigital number, since it uses as much as digits as its factorization.

91967377 is an evil number, because the sum of its binary digits is even.

The product of its digits is 500094, while the sum is 49.

The square root of 91967377 is about 9589.9623044098. The cubic root of 91967377 is about 451.3823778614.

The spelling of 91967377 in words is "ninety-one million, nine hundred sixty-seven thousand, three hundred seventy-seven".