1200200191 has 16 divisors (see below), whose sum is σ = 1293580800. Its totient is φ = 1110608928.

The previous prime is 1200200173. The next prime is 1200200203. The reversal of 1200200191 is 1910020021.

It is a cyclic number.

It is not a de Polignac number, because 1200200191 - 2⁷ = 1200200063 is a prime.

It is a Duffinian number.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1200200101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 148390 + ... + 156268.

It is an arithmetic number, because the mean of its divisors is an integer number (80848800).

Almost surely, 2^1200200191 is an apocalyptic number.

1200200191 is a deficient number, since it is larger than the sum of its proper divisors (93380609).

1200200191 is a wasteful number, since it uses less digits than its factorization.

1200200191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8118.

The product of its (nonzero) digits is 36, while the sum is 16.

The square root of 1200200191 is about 34643.9055390699. The cubic root of 1200200191 is about 1062.7176588640.

The spelling of 1200200191 in words is "one billion, two hundred million, two hundred thousand, one hundred ninety-one".