201606887 has 4 divisors (see below), whose sum is σ = 201851496. Its totient is φ = 201362280.

The previous prime is 201606883. The next prime is 201606901. The reversal of 201606887 is 788606102.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 201606887 - 2² = 201606883 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 201606887.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201606883) 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, 121064 + ... + 122717.

It is an arithmetic number, because the mean of its divisors is an integer number (50462874).

Almost surely, 2^201606887 is an apocalyptic number.

201606887 is a deficient number, since it is larger than the sum of its proper divisors (244609).

201606887 is an equidigital number, since it uses as much as digits as its factorization.

201606887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 244608.

The product of its (nonzero) digits is 32256, while the sum is 38.

The square root of 201606887 is about 14198.8340014242. The cubic root of 201606887 is about 586.3655604819.

The spelling of 201606887 in words is "two hundred one million, six hundred six thousand, eight hundred eighty-seven".