201997107 has 12 divisors (see below), whose sum is σ = 314217904. Its totient is φ = 124305840.

The previous prime is 201997099. The next prime is 201997121. The reversal of 201997107 is 701799102.

It is not a de Polignac number, because 201997107 - 2³ = 201997099 is a prime.

It is not an unprimeable number, because it can be changed into a prime (201997127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 863119 + ... + 863352.

Almost surely, 2^201997107 is an apocalyptic number.

201997107 is a deficient number, since it is larger than the sum of its proper divisors (112220797).

201997107 is a wasteful number, since it uses less digits than its factorization.

201997107 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1726490 (or 1726487 counting only the distinct ones).

The product of its (nonzero) digits is 7938, while the sum is 36.

The square root of 201997107 is about 14212.5686278026. The cubic root of 201997107 is about 586.7436297460.

The spelling of 201997107 in words is "two hundred one million, nine hundred ninety-seven thousand, one hundred seven".