685028011 has 4 divisors (see below), whose sum is σ = 686065024. Its totient is φ = 683991000.

The previous prime is 685027999. The next prime is 685028023. The reversal of 685028011 is 110820586.

685028011 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.

It is an interprime number because it is at equal distance from previous prime (685027999) and next prime (685028023).

It is a cyclic number.

It is not a de Polignac number, because 685028011 - 2¹⁵ = 684995243 is a prime.

It is a super-2 number, since 2×685028011² = 938526751709232242, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (685028051) 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, 517515 + ... + 518836.

It is an arithmetic number, because the mean of its divisors is an integer number (171516256).

Almost surely, 2^685028011 is an apocalyptic number.

685028011 is a deficient number, since it is larger than the sum of its proper divisors (1037013).

685028011 is a wasteful number, since it uses less digits than its factorization.

685028011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1037012.

The product of its (nonzero) digits is 3840, while the sum is 31.

The square root of 685028011 is about 26173.0397737825. The cubic root of 685028011 is about 881.5279974275.

Adding to 685028011 its reverse (110820586), we get a palindrome (795848597).

The spelling of 685028011 in words is "six hundred eighty-five million, twenty-eight thousand, eleven".