199380557 has 2 divisors, whose sum is σ = 199380558. Its totient is φ = 199380556.

The previous prime is 199380553. The next prime is 199380589. The reversal of 199380557 is 755083991.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 199204996 + 175561 = 14114^2 + 419^2 .

It is a cyclic number.

It is not a de Polignac number, because 199380557 - 2² = 199380553 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (199380553) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99690278 + 99690279.

It is an arithmetic number, because the mean of its divisors is an integer number (99690279).

Almost surely, 2^199380557 is an apocalyptic number.

It is an amenable number.

199380557 is a deficient number, since it is larger than the sum of its proper divisors (1).

199380557 is an equidigital number, since it uses as much as digits as its factorization.

199380557 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 340200, while the sum is 47.

The square root of 199380557 is about 14120.2180223961. The cubic root of 199380557 is about 584.1991691425.

The spelling of 199380557 in words is "one hundred ninety-nine million, three hundred eighty thousand, five hundred fifty-seven".