91682621 has 2 divisors, whose sum is σ = 91682622. Its totient is φ = 91682620.

The previous prime is 91682609. The next prime is 91682627. The reversal of 91682621 is 12628619.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 46389721 + 45292900 = 6811^2 + 6730^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-91682621 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 (91682627) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45841310 + 45841311.

It is an arithmetic number, because the mean of its divisors is an integer number (45841311).

Almost surely, 2^91682621 is an apocalyptic number.

It is an amenable number.

91682621 is a deficient number, since it is larger than the sum of its proper divisors (1).

91682621 is an equidigital number, since it uses as much as digits as its factorization.

91682621 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10368, while the sum is 35.

The square root of 91682621 is about 9575.1042291977. The cubic root of 91682621 is about 450.9160286992.

The spelling of 91682621 in words is "ninety-one million, six hundred eighty-two thousand, six hundred twenty-one".