576986981 has 2 divisors, whose sum is σ = 576986982. Its totient is φ = 576986980.

The previous prime is 576986959. The next prime is 576986999. The reversal of 576986981 is 189689675.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 456206881 + 120780100 = 21359^2 + 10990^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-576986981 is a prime.

It is a super-2 number, since 2×576986981² = 665827952486988722, 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 576986981.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (576986941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 288493490 + 288493491.

It is an arithmetic number, because the mean of its divisors is an integer number (288493491).

Almost surely, 2^576986981 is an apocalyptic number.

It is an amenable number.

576986981 is a deficient number, since it is larger than the sum of its proper divisors (1).

576986981 is an equidigital number, since it uses as much as digits as its factorization.

576986981 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6531840, while the sum is 59.

The square root of 576986981 is about 24020.5533033692. The cubic root of 576986981 is about 832.5084902656.

The spelling of 576986981 in words is "five hundred seventy-six million, nine hundred eighty-six thousand, nine hundred eighty-one".