991301000887 has 2 divisors, whose sum is σ = 991301000888. Its totient is φ = 991301000886.

The previous prime is 991301000869. The next prime is 991301000917. The reversal of 991301000887 is 788000103199.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 991301000887 - 2⁷ = 991301000759 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (991301006887) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 495650500443 + 495650500444.

It is an arithmetic number, because the mean of its divisors is an integer number (495650500444).

Almost surely, 2^991301000887 is an apocalyptic number.

991301000887 is a deficient number, since it is larger than the sum of its proper divisors (1).

991301000887 is an equidigital number, since it uses as much as digits as its factorization.

991301000887 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108864, while the sum is 46.

The spelling of 991301000887 in words is "nine hundred ninety-one billion, three hundred one million, eight hundred eighty-seven", and thus it is an aban number.