613716989 has 2 divisors, whose sum is σ = 613716990. Its totient is φ = 613716988.

The previous prime is 613716977. The next prime is 613717003. The reversal of 613716989 is 989617316.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 453264100 + 160452889 = 21290^2 + 12667^2 .

It is a cyclic number.

It is not a de Polignac number, because 613716989 - 2¹² = 613712893 is a prime.

It is a super-2 number, since 2×613716989² = 753297085174452242, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (613716919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 306858494 + 306858495.

It is an arithmetic number, because the mean of its divisors is an integer number (306858495).

Almost surely, 2^613716989 is an apocalyptic number.

It is an amenable number.

613716989 is a deficient number, since it is larger than the sum of its proper divisors (1).

613716989 is an equidigital number, since it uses as much as digits as its factorization.

613716989 is an evil number, because the sum of its binary digits is even.

The product of its digits is 489888, while the sum is 50.

The square root of 613716989 is about 24773.3120312969. The cubic root of 613716989 is about 849.8117179279.

The spelling of 613716989 in words is "six hundred thirteen million, seven hundred sixteen thousand, nine hundred eighty-nine".