607679981 has 2 divisors, whose sum is σ = 607679982. Its totient is φ = 607679980.

The previous prime is 607679951. The next prime is 607680001. The reversal of 607679981 is 189976706.

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., 582015625 + 25664356 = 24125^2 + 5066^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-607679981 is a prime.

It is a super-2 number, since 2×607679981² = 738549918616320722, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (607679951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 303839990 + 303839991.

It is an arithmetic number, because the mean of its divisors is an integer number (303839991).

Almost surely, 2^607679981 is an apocalyptic number.

It is an amenable number.

607679981 is a deficient number, since it is larger than the sum of its proper divisors (1).

607679981 is an equidigital number, since it uses as much as digits as its factorization.

607679981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1143072, while the sum is 53.

The square root of 607679981 is about 24651.1659156317. The cubic root of 607679981 is about 847.0160565521.

The spelling of 607679981 in words is "six hundred seven million, six hundred seventy-nine thousand, nine hundred eighty-one".