677918617 has 2 divisors, whose sum is σ = 677918618. Its totient is φ = 677918616.

The previous prime is 677918603. The next prime is 677918627. The reversal of 677918617 is 716819776.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 643941376 + 33977241 = 25376^2 + 5829^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-677918617 is a prime.

It is a super-3 number, since 3×677918617³ (a number of 27 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (677918627) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 338959308 + 338959309.

It is an arithmetic number, because the mean of its divisors is an integer number (338959309).

Almost surely, 2^677918617 is an apocalyptic number.

It is an amenable number.

677918617 is a deficient number, since it is larger than the sum of its proper divisors (1).

677918617 is an equidigital number, since it uses as much as digits as its factorization.

677918617 is an evil number, because the sum of its binary digits is even.

The product of its digits is 889056, while the sum is 52.

The square root of 677918617 is about 26036.8703380418. The cubic root of 677918617 is about 878.4678129047.

The spelling of 677918617 in words is "six hundred seventy-seven million, nine hundred eighteen thousand, six hundred seventeen".