3961677857 has 2 divisors, whose sum is σ = 3961677858. Its totient is φ = 3961677856.

The previous prime is 3961677851. The next prime is 3961677877. The reversal of 3961677857 is 7587761693.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2409239056 + 1552438801 = 49084^2 + 39401^2 .

It is a cyclic number.

It is not a de Polignac number, because 3961677857 - 2³⁰ = 2887936033 is a prime.

It is a super-2 number, since 2×3961677857² = 31389782885288224898, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 3961677796 and 3961677805.

It is not a weakly prime, because it can be changed into another prime (3961677851) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1980838928 + 1980838929.

It is an arithmetic number, because the mean of its divisors is an integer number (1980838929).

Almost surely, 2^3961677857 is an apocalyptic number.

It is an amenable number.

3961677857 is a deficient number, since it is larger than the sum of its proper divisors (1).

3961677857 is an equidigital number, since it uses as much as digits as its factorization.

3961677857 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13335840, while the sum is 59.

The square root of 3961677857 is about 62941.8609273669. The cubic root of 3961677857 is about 1582.3153919322.

The spelling of 3961677857 in words is "three billion, nine hundred sixty-one million, six hundred seventy-seven thousand, eight hundred fifty-seven".