685749027 has 8 divisors (see below), whose sum is σ = 927210240. Its totient is φ = 450726920.

The previous prime is 685749023. The next prime is 685749037. The reversal of 685749027 is 720947586.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 685749027 - 2² = 685749023 is a prime.

It is not an unprimeable number, because it can be changed into a prime (685749023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1609527 + ... + 1609952.

It is an arithmetic number, because the mean of its divisors is an integer number (115901280).

Almost surely, 2^685749027 is an apocalyptic number.

685749027 is a deficient number, since it is larger than the sum of its proper divisors (241461213).

685749027 is a wasteful number, since it uses less digits than its factorization.

685749027 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3219553.

The product of its (nonzero) digits is 846720, while the sum is 48.

The square root of 685749027 is about 26186.8101722986. The cubic root of 685749027 is about 881.8371686901.

The spelling of 685749027 in words is "six hundred eighty-five million, seven hundred forty-nine thousand, twenty-seven".