199628587 has 2 divisors, whose sum is σ = 199628588. Its totient is φ = 199628586.

The previous prime is 199628557. The next prime is 199628593. The reversal of 199628587 is 785826991.

It is a strong prime.

It is an emirp because it is prime and its reverse (785826991) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 199628587 - 2¹⁹ = 199104299 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (199628537) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99814293 + 99814294.

It is an arithmetic number, because the mean of its divisors is an integer number (99814294).

Almost surely, 2^199628587 is an apocalyptic number.

199628587 is a deficient number, since it is larger than the sum of its proper divisors (1).

199628587 is an equidigital number, since it uses as much as digits as its factorization.

199628587 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2177280, while the sum is 55.

The square root of 199628587 is about 14128.9980890366. The cubic root of 199628587 is about 584.4413172548.

The spelling of 199628587 in words is "one hundred ninety-nine million, six hundred twenty-eight thousand, five hundred eighty-seven".