91967951 has 2 divisors, whose sum is σ = 91967952. Its totient is φ = 91967950.

The previous prime is 91967947. The next prime is 91967957. The reversal of 91967951 is 15976919.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 91967951 - 2² = 91967947 is a prime.

It is a super-3 number, since 3×91967951³ (a number of 25 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a junction number, because it is equal to n+sod(n) for n = 91967896 and 91967905.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91967957) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45983975 + 45983976.

It is an arithmetic number, because the mean of its divisors is an integer number (45983976).

Almost surely, 2^91967951 is an apocalyptic number.

91967951 is a deficient number, since it is larger than the sum of its proper divisors (1).

91967951 is an equidigital number, since it uses as much as digits as its factorization.

91967951 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 153090, while the sum is 47.

The square root of 91967951 is about 9589.9922314880. The cubic root of 91967951 is about 451.3833169369.

The spelling of 91967951 in words is "ninety-one million, nine hundred sixty-seven thousand, nine hundred fifty-one".