685074293837 has 4 divisors (see below), whose sum is σ = 688092242496. Its totient is φ = 682056345180.

The previous prime is 685074293731. The next prime is 685074293851. The reversal of 685074293837 is 738392470586.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 685074293837 - 2⁸ = 685074293581 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 685074293837.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (685074293857) 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, 1508973989 + ... + 1508974442.

It is an arithmetic number, because the mean of its divisors is an integer number (172023060624).

Almost surely, 2^685074293837 is an apocalyptic number.

It is an amenable number.

685074293837 is a deficient number, since it is larger than the sum of its proper divisors (3017948659).

685074293837 is a wasteful number, since it uses less digits than its factorization.

685074293837 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3017948658.

The product of its (nonzero) digits is 60963840, while the sum is 62.

The spelling of 685074293837 in words is "six hundred eighty-five billion, seventy-four million, two hundred ninety-three thousand, eight hundred thirty-seven".