995071981 has 2 divisors, whose sum is σ = 995071982. Its totient is φ = 995071980.

The previous prime is 995071951. The next prime is 995071997. The reversal of 995071981 is 189170599.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 965096356 + 29975625 = 31066^2 + 5475^2 .

It is a cyclic number.

It is not a de Polignac number, because 995071981 - 2⁷ = 995071853 is a prime.

It is a super-2 number, since 2×995071981² = 1980336494742528722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (995071951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 497535990 + 497535991.

It is an arithmetic number, because the mean of its divisors is an integer number (497535991).

Almost surely, 2^995071981 is an apocalyptic number.

It is an amenable number.

995071981 is a deficient number, since it is larger than the sum of its proper divisors (1).

995071981 is an equidigital number, since it uses as much as digits as its factorization.

995071981 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 204120, while the sum is 49.

The square root of 995071981 is about 31544.7615460951. The cubic root of 995071981 is about 998.3546212135.

The spelling of 995071981 in words is "nine hundred ninety-five million, seventy-one thousand, nine hundred eighty-one".