201868685 has 4 divisors (see below), whose sum is σ = 242242428. Its totient is φ = 161494944.

The previous prime is 201868669. The next prime is 201868747. The reversal of 201868685 is 586868102.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 586868102 = 2 ⋅293434051.

It can be written as a sum of positive squares in 2 ways, for example, as 33154564 + 168714121 = 5758^2 + 12989^2 .

It is a cyclic number.

It is not a de Polignac number, because 201868685 - 2⁴ = 201868669 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20186864 + ... + 20186873.

It is an arithmetic number, because the mean of its divisors is an integer number (60560607).

Almost surely, 2^201868685 is an apocalyptic number.

It is an amenable number.

201868685 is a deficient number, since it is larger than the sum of its proper divisors (40373743).

201868685 is an equidigital number, since it uses as much as digits as its factorization.

201868685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40373742.

The product of its (nonzero) digits is 184320, while the sum is 44.

The square root of 201868685 is about 14208.0500069503. The cubic root of 201868685 is about 586.6192603668.

The spelling of 201868685 in words is "two hundred one million, eight hundred sixty-eight thousand, six hundred eighty-five".