686864734 has 4 divisors (see below), whose sum is σ = 1030297104. Its totient is φ = 343432366.

The previous prime is 686864693. The next prime is 686864743. The reversal of 686864734 is 437468686.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 171716182 + ... + 171716185.

It is an arithmetic number, because the mean of its divisors is an integer number (257574276).

Almost surely, 2^686864734 is an apocalyptic number.

686864734 is a deficient number, since it is larger than the sum of its proper divisors (343432370).

686864734 is a wasteful number, since it uses less digits than its factorization.

686864734 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 343432369.

The product of its digits is 4644864, while the sum is 52.

The square root of 686864734 is about 26208.1043572403. The cubic root of 686864734 is about 882.3151563900.

The spelling of 686864734 in words is "six hundred eighty-six million, eight hundred sixty-four thousand, seven hundred thirty-four".