199728547 has 2 divisors, whose sum is σ = 199728548. Its totient is φ = 199728546.

The previous prime is 199728499. The next prime is 199728569. The reversal of 199728547 is 745827991.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-199728547 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 199728494 and 199728503.

It is not a weakly prime, because it can be changed into another prime (199728577) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99864273 + 99864274.

It is an arithmetic number, because the mean of its divisors is an integer number (99864274).

Almost surely, 2^199728547 is an apocalyptic number.

199728547 is a deficient number, since it is larger than the sum of its proper divisors (1).

199728547 is an equidigital number, since it uses as much as digits as its factorization.

199728547 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1270080, while the sum is 52.

The square root of 199728547 is about 14132.5350521412. The cubic root of 199728547 is about 584.5388500558.

The spelling of 199728547 in words is "one hundred ninety-nine million, seven hundred twenty-eight thousand, five hundred forty-seven".