91742663 has 2 divisors, whose sum is σ = 91742664. Its totient is φ = 91742662.

The previous prime is 91742633. The next prime is 91742683. The reversal of 91742663 is 36624719.

It is a strong prime.

It is an emirp because it is prime and its reverse (36624719) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 91742663 - 2¹² = 91738567 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91742633) 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, 45871331 + 45871332.

It is an arithmetic number, because the mean of its divisors is an integer number (45871332).

Almost surely, 2^91742663 is an apocalyptic number.

91742663 is a deficient number, since it is larger than the sum of its proper divisors (1).

91742663 is an equidigital number, since it uses as much as digits as its factorization.

91742663 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 54432, while the sum is 38.

The square root of 91742663 is about 9578.2390343946. The cubic root of 91742663 is about 451.0144406335.

The spelling of 91742663 in words is "ninety-one million, seven hundred forty-two thousand, six hundred sixty-three".