685543201 has 4 divisors (see below), whose sum is σ = 783477952. Its totient is φ = 587608452.

The previous prime is 685543099. The next prime is 685543213. The reversal of 685543201 is 102345586.

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 685543201 - 2¹³ = 685535009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (685543291) 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, 48967365 + ... + 48967378.

It is an arithmetic number, because the mean of its divisors is an integer number (195869488).

Almost surely, 2^685543201 is an apocalyptic number.

It is an amenable number.

685543201 is a deficient number, since it is larger than the sum of its proper divisors (97934751).

685543201 is an equidigital number, since it uses as much as digits as its factorization.

685543201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97934750.

The product of its (nonzero) digits is 28800, while the sum is 34.

The square root of 685543201 is about 26182.8799218115. The cubic root of 685543201 is about 881.7489327260.

Adding to 685543201 its reverse (102345586), we get a palindrome (787888787).

The spelling of 685543201 in words is "six hundred eighty-five million, five hundred forty-three thousand, two hundred one".