686053959 has 16 divisors (see below), whose sum is σ = 955122432. Its totient is φ = 437203008.

The previous prime is 686053909. The next prime is 686053981. The reversal of 686053959 is 959350686.

It is not a de Polignac number, because 686053959 - 2⁷ = 686053831 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (686053909) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 184947 + ... + 188619.

It is an arithmetic number, because the mean of its divisors is an integer number (59695152).

Almost surely, 2^686053959 is an apocalyptic number.

686053959 is a gapful number since it is divisible by the number (69) formed by its first and last digit.

686053959 is a deficient number, since it is larger than the sum of its proper divisors (269068473).

686053959 is a wasteful number, since it uses less digits than its factorization.

686053959 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6406.

The product of its (nonzero) digits is 1749600, while the sum is 51.

The square root of 686053959 is about 26192.6317692591. The cubic root of 686053959 is about 881.9678581569.

The spelling of 686053959 in words is "six hundred eighty-six million, fifty-three thousand, nine hundred fifty-nine".