201066997 has 4 divisors (see below), whose sum is σ = 201246220. Its totient is φ = 200887776.

The previous prime is 201066977. The next prime is 201067003. The reversal of 201066997 is 799660102.

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

It can be written as a sum of positive squares in 2 ways, for example, as 128459556 + 72607441 = 11334^2 + 8521^2 .

It is a cyclic number.

It is not a de Polignac number, because 201066997 - 2¹¹ = 201064949 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201066907) 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, 87918 + ... + 90175.

It is an arithmetic number, because the mean of its divisors is an integer number (50311555).

Almost surely, 2^201066997 is an apocalyptic number.

It is an amenable number.

201066997 is a deficient number, since it is larger than the sum of its proper divisors (179223).

201066997 is a wasteful number, since it uses less digits than its factorization.

201066997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 179222.

The product of its (nonzero) digits is 40824, while the sum is 40.

The square root of 201066997 is about 14179.8094839106. The cubic root of 201066997 is about 585.8416764098.

The spelling of 201066997 in words is "two hundred one million, sixty-six thousand, nine hundred ninety-seven".