91946861 has 2 divisors, whose sum is σ = 91946862. Its totient is φ = 91946860.

The previous prime is 91946843. The next prime is 91946923. The reversal of 91946861 is 16864919.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 68724100 + 23222761 = 8290^2 + 4819^2 .

It is a cyclic number.

It is not a de Polignac number, because 91946861 - 2⁶ = 91946797 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91948861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45973430 + 45973431.

It is an arithmetic number, because the mean of its divisors is an integer number (45973431).

Almost surely, 2^91946861 is an apocalyptic number.

It is an amenable number.

91946861 is a deficient number, since it is larger than the sum of its proper divisors (1).

91946861 is an equidigital number, since it uses as much as digits as its factorization.

91946861 is an evil number, because the sum of its binary digits is even.

The product of its digits is 93312, while the sum is 44.

The square root of 91946861 is about 9588.8925846523. The cubic root of 91946861 is about 451.3488107065.

The spelling of 91946861 in words is "ninety-one million, nine hundred forty-six thousand, eight hundred sixty-one".