995459981 has 2 divisors, whose sum is σ = 995459982. Its totient is φ = 995459980.

The previous prime is 995459963. The next prime is 995460043. The reversal of 995459981 is 189954599.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 776123881 + 219336100 = 27859^2 + 14810^2 .

It is a cyclic number.

It is not a de Polignac number, because 995459981 - 2¹⁸ = 995197837 is a prime.

It is a super-2 number, since 2×995459981² = 1981881147545040722, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 995459981.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (995453981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 497729990 + 497729991.

It is an arithmetic number, because the mean of its divisors is an integer number (497729991).

Almost surely, 2^995459981 is an apocalyptic number.

It is an amenable number.

995459981 is a deficient number, since it is larger than the sum of its proper divisors (1).

995459981 is an equidigital number, since it uses as much as digits as its factorization.

995459981 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5248800, while the sum is 59.

The square root of 995459981 is about 31550.9109377210. The cubic root of 995459981 is about 998.4843643424.

The spelling of 995459981 in words is "nine hundred ninety-five million, four hundred fifty-nine thousand, nine hundred eighty-one".