981646199 has 2 divisors, whose sum is σ = 981646200. Its totient is φ = 981646198.

The previous prime is 981646157. The next prime is 981646241. The reversal of 981646199 is 991646189.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (981646157) and next prime (981646241).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-981646199 is a prime.

It is a super-2 number, since 2×981646199² = 1927258520022295202, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 981646199.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (981646129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 490823099 + 490823100.

It is an arithmetic number, because the mean of its divisors is an integer number (490823100).

Almost surely, 2^981646199 is an apocalyptic number.

981646199 is a deficient number, since it is larger than the sum of its proper divisors (1).

981646199 is an equidigital number, since it uses as much as digits as its factorization.

981646199 is an evil number, because the sum of its binary digits is even.

The product of its digits is 839808, while the sum is 53.

The square root of 981646199 is about 31331.2336016315. The cubic root of 981646199 is about 993.8442508394.

The spelling of 981646199 in words is "nine hundred eighty-one million, six hundred forty-six thousand, one hundred ninety-nine".