685214201 has 4 divisors (see below), whose sum is σ = 783101952. Its totient is φ = 587326452.

The previous prime is 685214191. The next prime is 685214209. The reversal of 685214201 is 102412586.

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-685214201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (685214209) 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 3 ways as a sum of consecutive naturals, for example, 48943865 + ... + 48943878.

It is an arithmetic number, because the mean of its divisors is an integer number (195775488).

Almost surely, 2^685214201 is an apocalyptic number.

It is an amenable number.

685214201 is a deficient number, since it is larger than the sum of its proper divisors (97887751).

685214201 is an equidigital number, since it uses as much as digits as its factorization.

685214201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97887750.

The product of its (nonzero) digits is 3840, while the sum is 29.

The square root of 685214201 is about 26176.5964365118. The cubic root of 685214201 is about 881.6078563661.

Adding to 685214201 its reverse (102412586), we get a palindrome (787626787).

The spelling of 685214201 in words is "six hundred eighty-five million, two hundred fourteen thousand, two hundred one".