995519989 has 2 divisors, whose sum is σ = 995519990. Its totient is φ = 995519988.

The previous prime is 995519981. The next prime is 995520007. The reversal of 995519989 is 989915599.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 995087025 + 432964 = 31545^2 + 658^2 .

It is a cyclic number.

It is not a de Polignac number, because 995519989 - 2³ = 995519981 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 995519989.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (995519981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 497759994 + 497759995.

It is an arithmetic number, because the mean of its divisors is an integer number (497759995).

Almost surely, 2^995519989 is an apocalyptic number.

It is an amenable number.

995519989 is a deficient number, since it is larger than the sum of its proper divisors (1).

995519989 is an equidigital number, since it uses as much as digits as its factorization.

995519989 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11809800, while the sum is 64.

The square root of 995519989 is about 31551.8618943479. The cubic root of 995519989 is about 998.5044273776.

The spelling of 995519989 in words is "nine hundred ninety-five million, five hundred nineteen thousand, nine hundred eighty-nine".