685377867 has 4 divisors (see below), whose sum is σ = 913837160. Its totient is φ = 456918576.

The previous prime is 685377863. The next prime is 685377877. The reversal of 685377867 is 768773586.

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

It is not a de Polignac number, because 685377867 - 2² = 685377863 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (685377863) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 114229642 + ... + 114229647.

It is an arithmetic number, because the mean of its divisors is an integer number (228459290).

Almost surely, 2^685377867 is an apocalyptic number.

685377867 is a deficient number, since it is larger than the sum of its proper divisors (228459293).

685377867 is a wasteful number, since it uses less digits than its factorization.

685377867 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 228459292.

The product of its digits is 11854080, while the sum is 57.

The square root of 685377867 is about 26179.7224393231. The cubic root of 685377867 is about 881.6780425672.

The spelling of 685377867 in words is "six hundred eighty-five million, three hundred seventy-seven thousand, eight hundred sixty-seven".