199358947 has 2 divisors, whose sum is σ = 199358948. Its totient is φ = 199358946.

The previous prime is 199358909. The next prime is 199358953. The reversal of 199358947 is 749853991.

It is a strong prime.

It is an emirp because it is prime and its reverse (749853991) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 199358947 - 2¹⁹ = 198834659 is a prime.

It is not a weakly prime, because it can be changed into another prime (199358977) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99679473 + 99679474.

It is an arithmetic number, because the mean of its divisors is an integer number (99679474).

Almost surely, 2^199358947 is an apocalyptic number.

199358947 is a deficient number, since it is larger than the sum of its proper divisors (1).

199358947 is an equidigital number, since it uses as much as digits as its factorization.

199358947 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2449440, while the sum is 55.

The square root of 199358947 is about 14119.4527868469. The cubic root of 199358947 is about 584.1780621025.

It can be divided in two parts, 19935 and 8947, that added together give a palindrome (28882).

The spelling of 199358947 in words is "one hundred ninety-nine million, three hundred fifty-eight thousand, nine hundred forty-seven".