8194865677 has 2 divisors, whose sum is σ = 8194865678. Its totient is φ = 8194865676.

The previous prime is 8194865669. The next prime is 8194865687. The reversal of 8194865677 is 7765684918.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8037839716 + 157025961 = 89654^2 + 12531^2 .

It is a cyclic number.

It is not a de Polignac number, because 8194865677 - 2³ = 8194865669 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8194865687) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4097432838 + 4097432839.

It is an arithmetic number, because the mean of its divisors is an integer number (4097432839).

Almost surely, 2^8194865677 is an apocalyptic number.

It is an amenable number.

8194865677 is a deficient number, since it is larger than the sum of its proper divisors (1).

8194865677 is an equidigital number, since it uses as much as digits as its factorization.

8194865677 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20321280, while the sum is 61.

The square root of 8194865677 is about 90525.4973860956. The cubic root of 8194865677 is about 2016.1087127649.

The spelling of 8194865677 in words is "eight billion, one hundred ninety-four million, eight hundred sixty-five thousand, six hundred seventy-seven".