199363991 has 2 divisors, whose sum is σ = 199363992. Its totient is φ = 199363990.

The previous prime is 199363961. The next prime is 199364021.

199363991 is nontrivially palindromic in base 10.

It is a balanced prime because it is at equal distance from previous prime (199363961) and next prime (199364021).

It is a palprime.

It is a cyclic number.

It is not a de Polignac number, because 199363991 - 2²⁶ = 132255127 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (199363961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99681995 + 99681996.

It is an arithmetic number, because the mean of its divisors is an integer number (99681996).

Almost surely, 2^199363991 is an apocalyptic number.

199363991 is a deficient number, since it is larger than the sum of its proper divisors (1).

199363991 is an equidigital number, since it uses as much as digits as its factorization.

199363991 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 354294, while the sum is 50.

The square root of 199363991 is about 14119.6314045374. The cubic root of 199363991 is about 584.1829888428.

The spelling of 199363991 in words is "one hundred ninety-nine million, three hundred sixty-three thousand, nine hundred ninety-one".