999152587891 has 2 divisors, whose sum is σ = 999152587892. Its totient is φ = 999152587890.

The previous prime is 999152587883. The next prime is 999152587943. The reversal of 999152587891 is 198785251999.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 999152587891 - 2³ = 999152587883 is a prime.

It is not a weakly prime, because it can be changed into another prime (999152587991) 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, 499576293945 + 499576293946.

It is an arithmetic number, because the mean of its divisors is an integer number (499576293946).

Almost surely, 2^999152587891 is an apocalyptic number.

999152587891 is the 632188-th centered pentagonal number.

999152587891 is a deficient number, since it is larger than the sum of its proper divisors (1).

999152587891 is an equidigital number, since it uses as much as digits as its factorization.

999152587891 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 146966400, while the sum is 73.

The spelling of 999152587891 in words is "nine hundred ninety-nine billion, one hundred fifty-two million, five hundred eighty-seven thousand, eight hundred ninety-one".