999998884531 has 2 divisors, whose sum is σ = 999998884532. Its totient is φ = 999998884530.

The previous prime is 999998884499. The next prime is 999998884543. The reversal of 999998884531 is 135488899999.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 999998884531 - 2⁵ = 999998884499 is a prime.

It is a super-2 number, since 2×999998884531² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (999998884231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499999442265 + 499999442266.

It is an arithmetic number, because the mean of its divisors is an integer number (499999442266).

Almost surely, 2^999998884531 is an apocalyptic number.

999998884531 is a deficient number, since it is larger than the sum of its proper divisors (1).

999998884531 is an equidigital number, since it uses as much as digits as its factorization.

999998884531 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1813985280, while the sum is 82.

The spelling of 999998884531 in words is "nine hundred ninety-nine billion, nine hundred ninety-eight million, eight hundred eighty-four thousand, five hundred thirty-one".