677965843 has 2 divisors, whose sum is σ = 677965844. Its totient is φ = 677965842.

The previous prime is 677965817. The next prime is 677965859. The reversal of 677965843 is 348569776.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-677965843 is a prime.

It is not a weakly prime, because it can be changed into another prime (677965643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 338982921 + 338982922.

It is an arithmetic number, because the mean of its divisors is an integer number (338982922).

Almost surely, 2^677965843 is an apocalyptic number.

677965843 is a deficient number, since it is larger than the sum of its proper divisors (1).

677965843 is an equidigital number, since it uses as much as digits as its factorization.

677965843 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7620480, while the sum is 55.

The square root of 677965843 is about 26037.7772284809. Note that the first 3 decimals coincide. The cubic root of 677965843 is about 878.4882113992.

The spelling of 677965843 in words is "six hundred seventy-seven million, nine hundred sixty-five thousand, eight hundred forty-three".