191201099 has 2 divisors, whose sum is σ = 191201100. Its totient is φ = 191201098.

The previous prime is 191201077. The next prime is 191201107. The reversal of 191201099 is 990102191.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-191201099 is a prime.

It is not a weakly prime, because it can be changed into another prime (191201299) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 95600549 + 95600550.

It is an arithmetic number, because the mean of its divisors is an integer number (95600550).

Almost surely, 2^191201099 is an apocalyptic number.

191201099 is a deficient number, since it is larger than the sum of its proper divisors (1).

191201099 is an equidigital number, since it uses as much as digits as its factorization.

191201099 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1458, while the sum is 32.

The square root of 191201099 is about 13827.5485535217. The cubic root of 191201099 is about 576.0985667145.

The spelling of 191201099 in words is "one hundred ninety-one million, two hundred one thousand, ninety-nine".