686933746 has 4 divisors (see below), whose sum is σ = 1030400622. Its totient is φ = 343466872.

The previous prime is 686933707. The next prime is 686933783. The reversal of 686933746 is 647339686.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 610633521 + 76300225 = 24711^2 + 8735^2 .

It is a junction number, because it is equal to n+sod(n) for n = 686933693 and 686933702.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 171733435 + ... + 171733438.

Almost surely, 2^686933746 is an apocalyptic number.

686933746 is a deficient number, since it is larger than the sum of its proper divisors (343466876).

686933746 is a wasteful number, since it uses less digits than its factorization.

686933746 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 343466875.

The product of its digits is 3919104, while the sum is 52.

The square root of 686933746 is about 26209.4209398071. The cubic root of 686933746 is about 882.3447052911.

The spelling of 686933746 in words is "six hundred eighty-six million, nine hundred thirty-three thousand, seven hundred forty-six".