686771294 has 8 divisors (see below), whose sum is σ = 1123807608. Its totient is φ = 312168760.

The previous prime is 686771291. The next prime is 686771317. The reversal of 686771294 is 492177686.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (686771291) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15608417 + ... + 15608460.

It is an arithmetic number, because the mean of its divisors is an integer number (140475951).

Almost surely, 2^686771294 is an apocalyptic number.

686771294 is a deficient number, since it is larger than the sum of its proper divisors (437036314).

686771294 is a wasteful number, since it uses less digits than its factorization.

686771294 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31216890.

The product of its digits is 1016064, while the sum is 50.

The square root of 686771294 is about 26206.3216419245. The cubic root of 686771294 is about 882.2751449860.

The spelling of 686771294 in words is "six hundred eighty-six million, seven hundred seventy-one thousand, two hundred ninety-four".