91683491 has 2 divisors, whose sum is σ = 91683492. Its totient is φ = 91683490.

The previous prime is 91683443. The next prime is 91683541. The reversal of 91683491 is 19438619.

It is a weak prime.

It is an emirp because it is prime and its reverse (19438619) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 91683491 - 2¹⁸ = 91421347 is a prime.

It is not a weakly prime, because it can be changed into another prime (91683191) 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, 45841745 + 45841746.

It is an arithmetic number, because the mean of its divisors is an integer number (45841746).

Almost surely, 2^91683491 is an apocalyptic number.

91683491 is a deficient number, since it is larger than the sum of its proper divisors (1).

91683491 is an equidigital number, since it uses as much as digits as its factorization.

91683491 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 46656, while the sum is 41.

The square root of 91683491 is about 9575.1496594048. The cubic root of 91683491 is about 450.9174549808.

The spelling of 91683491 in words is "ninety-one million, six hundred eighty-three thousand, four hundred ninety-one".