686943436 has 6 divisors (see below), whose sum is σ = 1202151020. Its totient is φ = 343471716.

The previous prime is 686943409. The next prime is 686943449. The reversal of 686943436 is 634349686.

It is a self number, because there is not a number n which added to its sum of digits gives 686943436.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 85867926 + ... + 85867933.

Almost surely, 2^686943436 is an apocalyptic number.

It is an amenable number.

686943436 is a deficient number, since it is larger than the sum of its proper divisors (515207584).

686943436 is a wasteful number, since it uses less digits than its factorization.

686943436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171735863 (or 171735861 counting only the distinct ones).

The product of its digits is 2239488, while the sum is 49.

The square root of 686943436 is about 26209.6057963488. The cubic root of 686943436 is about 882.3488541046.

It can be divided in two parts, 6869 and 43436, that added together give a palindrome (50305).

The spelling of 686943436 in words is "six hundred eighty-six million, nine hundred forty-three thousand, four hundred thirty-six".