91965098887 has 2 divisors, whose sum is σ = 91965098888. Its totient is φ = 91965098886.

The previous prime is 91965098873. The next prime is 91965098941. The reversal of 91965098887 is 78889056919.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 91965098887 - 2¹⁹ = 91964574599 is a prime.

It is a super-3 number, since 3×91965098887³ (a number of 34 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91965098087) 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, 45982549443 + 45982549444.

It is an arithmetic number, because the mean of its divisors is an integer number (45982549444).

Almost surely, 2^91965098887 is an apocalyptic number.

91965098887 is a deficient number, since it is larger than the sum of its proper divisors (1).

91965098887 is an equidigital number, since it uses as much as digits as its factorization.

91965098887 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 78382080, while the sum is 70.

The spelling of 91965098887 in words is "ninety-one billion, nine hundred sixty-five million, ninety-eight thousand, eight hundred eighty-seven".