981942568 has 16 divisors (see below), whose sum is σ = 1854583380. Its totient is φ = 487387008.

The previous prime is 981942547. The next prime is 981942589. The reversal of 981942568 is 865249189.

It is an interprime number because it is at equal distance from previous prime (981942547) and next prime (981942589).

It can be written as a sum of positive squares in 2 ways, for example, as 979564804 + 2377764 = 31298^2 + 1542^2 .

It is a super-2 number, since 2×981942568² = 1928422413700869248, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 446871 + ... + 449062.

Almost surely, 2^981942568 is an apocalyptic number.

It is an amenable number.

981942568 is a deficient number, since it is larger than the sum of its proper divisors (872640812).

981942568 is a wasteful number, since it uses less digits than its factorization.

981942568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 896076 (or 896072 counting only the distinct ones).

The product of its digits is 1244160, while the sum is 52.

The square root of 981942568 is about 31335.9628542032. The cubic root of 981942568 is about 993.9442580144.

The spelling of 981942568 in words is "nine hundred eighty-one million, nine hundred forty-two thousand, five hundred sixty-eight".