91363669 has 2 divisors, whose sum is σ = 91363670. Its totient is φ = 91363668.

The previous prime is 91363667. The next prime is 91363681. The reversal of 91363669 is 96636319.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 56400100 + 34963569 = 7510^2 + 5913^2 .

It is a cyclic number.

It is not a de Polignac number, because 91363669 - 2¹ = 91363667 is a prime.

It is a super-2 number, since 2×91363669² = 16694640026283122, which contains 22 as substring.

Together with 91363667, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91363667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45681834 + 45681835.

It is an arithmetic number, because the mean of its divisors is an integer number (45681835).

Almost surely, 2^91363669 is an apocalyptic number.

It is an amenable number.

91363669 is a deficient number, since it is larger than the sum of its proper divisors (1).

91363669 is an equidigital number, since it uses as much as digits as its factorization.

91363669 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 157464, while the sum is 43.

The square root of 91363669 is about 9558.4344429410. The cubic root of 91363669 is about 450.3925282858.

The spelling of 91363669 in words is "ninety-one million, three hundred sixty-three thousand, six hundred sixty-nine".