199880477 has 2 divisors, whose sum is σ = 199880478. Its totient is φ = 199880476.

The previous prime is 199880413. The next prime is 199880479. The reversal of 199880477 is 774088991.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 165611161 + 34269316 = 12869^2 + 5854^2 .

It is a cyclic number.

It is not a de Polignac number, because 199880477 - 2⁶ = 199880413 is a prime.

Together with 199880479, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (199880479) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99940238 + 99940239.

It is an arithmetic number, because the mean of its divisors is an integer number (99940239).

Almost surely, 2^199880477 is an apocalyptic number.

It is an amenable number.

199880477 is a deficient number, since it is larger than the sum of its proper divisors (1).

199880477 is an equidigital number, since it uses as much as digits as its factorization.

199880477 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1016064, while the sum is 53.

The square root of 199880477 is about 14137.9092160050. The cubic root of 199880477 is about 584.6870286376.

The spelling of 199880477 in words is "one hundred ninety-nine million, eight hundred eighty thousand, four hundred seventy-seven".