1201939199 has 4 divisors (see below), whose sum is σ = 1202010864. Its totient is φ = 1201867536.

The previous prime is 1201939187. The next prime is 1201939201. The reversal of 1201939199 is 9919391021.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 1201939199 - 2²⁰ = 1200890623 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 (1201933199) 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, 4334 + ... + 49220.

It is an arithmetic number, because the mean of its divisors is an integer number (300502716).

Almost surely, 2^1201939199 is an apocalyptic number.

1201939199 is a deficient number, since it is larger than the sum of its proper divisors (71665).

1201939199 is an equidigital number, since it uses as much as digits as its factorization.

1201939199 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71664.

The product of its (nonzero) digits is 39366, while the sum is 44.

The square root of 1201939199 is about 34668.9947791972. The cubic root of 1201939199 is about 1063.2306795706.

The spelling of 1201939199 in words is "one billion, two hundred one million, nine hundred thirty-nine thousand, one hundred ninety-nine".