199969967 has 2 divisors, whose sum is σ = 199969968. Its totient is φ = 199969966.

The previous prime is 199969961. The next prime is 199970011. The reversal of 199969967 is 769969991.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 199969967 - 2⁸ = 199969711 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 (199969961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99984983 + 99984984.

It is an arithmetic number, because the mean of its divisors is an integer number (99984984).

Almost surely, 2^199969967 is an apocalyptic number.

199969967 is a deficient number, since it is larger than the sum of its proper divisors (1).

199969967 is an equidigital number, since it uses as much as digits as its factorization.

199969967 is an evil number, because the sum of its binary digits is even.

The product of its digits is 14880348, while the sum is 65.

The square root of 199969967 is about 14141.0737569677. The cubic root of 199969967 is about 584.7742738356.

The spelling of 199969967 in words is "one hundred ninety-nine million, nine hundred sixty-nine thousand, nine hundred sixty-seven".