685081153 has 4 divisors (see below), whose sum is σ = 685173168. Its totient is φ = 684989140.

The previous prime is 685081069. The next prime is 685081217. The reversal of 685081153 is 351180586.

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 a de Polignac number, because none of the positive numbers 2^k-685081153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (685081853) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33751 + ... + 50092.

It is an arithmetic number, because the mean of its divisors is an integer number (171293292).

Almost surely, 2^685081153 is an apocalyptic number.

It is an amenable number.

685081153 is a deficient number, since it is larger than the sum of its proper divisors (92015).

685081153 is an equidigital number, since it uses as much as digits as its factorization.

685081153 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92014.

The product of its (nonzero) digits is 28800, while the sum is 37.

The square root of 685081153 is about 26174.0549590620. The cubic root of 685081153 is about 881.5507920912.

The spelling of 685081153 in words is "six hundred eighty-five million, eighty-one thousand, one hundred fifty-three".