981199 has 2 divisors, whose sum is σ = 981200. Its totient is φ = 981198.

The previous prime is 981187. The next prime is 981209. The reversal of 981199 is 991189.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 981199 - 2⁹ = 980687 is a prime.

981199 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (981139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 490599 + 490600.

It is an arithmetic number, because the mean of its divisors is an integer number (490600).

2⁹⁸¹¹⁹⁹ is an apocalyptic number.

981199 is a deficient number, since it is larger than the sum of its proper divisors (1).

981199 is an equidigital number, since it uses as much as digits as its factorization.

981199 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5832, while the sum is 37.

The square root of 981199 is about 990.5548949957. The cubic root of 981199 is about 99.3693309267.

The spelling of 981199 in words is "nine hundred eighty-one thousand, one hundred ninety-nine".