686683801 has 4 divisors (see below), whose sum is σ = 686742912. Its totient is φ = 686624692.

The previous prime is 686683783. The next prime is 686683859. The reversal of 686683801 is 108386686.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 108386686 = 2 ⋅54193343.

It is a cyclic number.

It is not a de Polignac number, because 686683801 - 2⁹ = 686683289 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (686683901) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5725 + ... + 37498.

It is an arithmetic number, because the mean of its divisors is an integer number (171685728).

Almost surely, 2^686683801 is an apocalyptic number.

It is an amenable number.

686683801 is a deficient number, since it is larger than the sum of its proper divisors (59111).

686683801 is a wasteful number, since it uses less digits than its factorization.

686683801 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59110.

The product of its (nonzero) digits is 331776, while the sum is 46.

The square root of 686683801 is about 26204.6522777922. The cubic root of 686683801 is about 882.2376768225.

The spelling of 686683801 in words is "six hundred eighty-six million, six hundred eighty-three thousand, eight hundred one".