686682043 has 4 divisors (see below), whose sum is σ = 716537808. Its totient is φ = 656826280.

The previous prime is 686681993. The next prime is 686682077. The reversal of 686682043 is 340286686.

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

It is a cyclic number.

It is not a de Polignac number, because 686682043 - 2¹⁷ = 686550971 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (686683043) 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, 14927848 + ... + 14927893.

It is an arithmetic number, because the mean of its divisors is an integer number (179134452).

Almost surely, 2^686682043 is an apocalyptic number.

686682043 is a deficient number, since it is larger than the sum of its proper divisors (29855765).

686682043 is a wasteful number, since it uses less digits than its factorization.

686682043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29855764.

The product of its (nonzero) digits is 331776, while the sum is 43.

The square root of 686682043 is about 26204.6187341087. The cubic root of 686682043 is about 882.2369239407.

The spelling of 686682043 in words is "six hundred eighty-six million, six hundred eighty-two thousand, forty-three".