685234367 has 4 divisors (see below), whose sum is σ = 685493016. Its totient is φ = 684975720.

The previous prime is 685234349. The next prime is 685234391. The reversal of 685234367 is 763432586.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-685234367 is a prime.

It is a super-2 number, since 2×685234367² = 939092275435781378, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (685234337) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 125309 + ... + 130662.

It is an arithmetic number, because the mean of its divisors is an integer number (171373254).

Almost surely, 2^685234367 is an apocalyptic number.

685234367 is a deficient number, since it is larger than the sum of its proper divisors (258649).

685234367 is a wasteful number, since it uses less digits than its factorization.

685234367 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 258648.

The product of its digits is 725760, while the sum is 44.

The square root of 685234367 is about 26176.9816250843. The cubic root of 685234367 is about 881.6165049170.

The spelling of 685234367 in words is "six hundred eighty-five million, two hundred thirty-four thousand, three hundred sixty-seven".