685033381 has 4 divisors (see below), whose sum is σ = 707131264. Its totient is φ = 662935500.

The previous prime is 685033361. The next prime is 685033397. The reversal of 685033381 is 183330586.

685033381 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 685033381 - 2⁹ = 685032869 is a prime.

It is a super-2 number, since 2×685033381² = 938541466168582322, which contains 22 as substring.

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 685033381.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (685033361) 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, 11048895 + ... + 11048956.

It is an arithmetic number, because the mean of its divisors is an integer number (176782816).

Almost surely, 2^685033381 is an apocalyptic number.

It is an amenable number.

685033381 is a deficient number, since it is larger than the sum of its proper divisors (22097883).

685033381 is a wasteful number, since it uses less digits than its factorization.

685033381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22097882.

The product of its (nonzero) digits is 51840, while the sum is 37.

The square root of 685033381 is about 26173.1423600606. The cubic root of 685033381 is about 881.5303008822.

The spelling of 685033381 in words is "six hundred eighty-five million, thirty-three thousand, three hundred eighty-one".