3961677817 has 2 divisors, whose sum is σ = 3961677818. Its totient is φ = 3961677816.

The previous prime is 3961677697. The next prime is 3961677851. The reversal of 3961677817 is 7187761693.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3928280976 + 33396841 = 62676^2 + 5779^2 .

It is a cyclic number.

It is not a de Polignac number, because 3961677817 - 2²³ = 3953289209 is a prime.

It is a super-2 number, since 2×3961677817² = 31389782251419770978, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (3961677857) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1980838908 + 1980838909.

It is an arithmetic number, because the mean of its divisors is an integer number (1980838909).

Almost surely, 2^3961677817 is an apocalyptic number.

It is an amenable number.

3961677817 is a deficient number, since it is larger than the sum of its proper divisors (1).

3961677817 is an equidigital number, since it uses as much as digits as its factorization.

3961677817 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2667168, while the sum is 55.

The square root of 3961677817 is about 62941.8606096134. The cubic root of 3961677817 is about 1582.3153866068.

The spelling of 3961677817 in words is "three billion, nine hundred sixty-one million, six hundred seventy-seven thousand, eight hundred seventeen".