996111989 has 2 divisors, whose sum is σ = 996111990. Its totient is φ = 996111988.

The previous prime is 996111943. The next prime is 996112003. The reversal of 996111989 is 989111699.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 874384900 + 121727089 = 29570^2 + 11033^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-996111989 is a prime.

It is a super-2 number, since 2×996111989² = 1984478189259072242, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 996111989.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (996111089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 498055994 + 498055995.

It is an arithmetic number, because the mean of its divisors is an integer number (498055995).

Almost surely, 2^996111989 is an apocalyptic number.

It is an amenable number.

996111989 is a deficient number, since it is larger than the sum of its proper divisors (1).

996111989 is an equidigital number, since it uses as much as digits as its factorization.

996111989 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 314928, while the sum is 53.

The square root of 996111989 is about 31561.2418798754. The cubic root of 996111989 is about 998.7023130704.

The spelling of 996111989 in words is "nine hundred ninety-six million, one hundred eleven thousand, nine hundred eighty-nine".