199880479 has 2 divisors, whose sum is σ = 199880480. Its totient is φ = 199880478.

The previous prime is 199880477. The next prime is 199880489. The reversal of 199880479 is 974088991.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 199880479 - 2¹ = 199880477 is a prime.

Together with 199880477, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (199880477) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99940239 + 99940240.

It is an arithmetic number, because the mean of its divisors is an integer number (99940240).

Almost surely, 2^199880479 is an apocalyptic number.

199880479 is a deficient number, since it is larger than the sum of its proper divisors (1).

199880479 is an equidigital number, since it uses as much as digits as its factorization.

199880479 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1306368, while the sum is 55.

The square root of 199880479 is about 14137.9092867368. The cubic root of 199880479 is about 584.6870305877.

The spelling of 199880479 in words is "one hundred ninety-nine million, eight hundred eighty thousand, four hundred seventy-nine".