3686693857 has 8 divisors (see below), whose sum is σ = 4596397632. Its totient is φ = 2872748400.

The previous prime is 3686693849. The next prime is 3686693863. The reversal of 3686693857 is 7583966863.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 3686693857 - 2³ = 3686693849 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3686693795 and 3686693804.

It is not an unprimeable number, because it can be changed into a prime (3686693807) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23939494 + ... + 23939647.

It is an arithmetic number, because the mean of its divisors is an integer number (574549704).

Almost surely, 2^3686693857 is an apocalyptic number.

It is an amenable number.

3686693857 is a deficient number, since it is larger than the sum of its proper divisors (909703775).

3686693857 is a wasteful number, since it uses less digits than its factorization.

3686693857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47879159.

The product of its digits is 39191040, while the sum is 61.

The square root of 3686693857 is about 60718.1509682237. The cubic root of 3686693857 is about 1544.8240611265.

The spelling of 3686693857 in words is "three billion, six hundred eighty-six million, six hundred ninety-three thousand, eight hundred fifty-seven".