199430387 has 4 divisors (see below), whose sum is σ = 214771200. Its totient is φ = 184089576.

The previous prime is 199430311. The next prime is 199430393. The reversal of 199430387 is 783034991.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 783034991 = 14389 ⋅54419.

It is a cyclic number.

It is not a de Polignac number, because 199430387 - 2²⁴ = 182653171 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (199130387) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7670387 + ... + 7670412.

It is an arithmetic number, because the mean of its divisors is an integer number (53692800).

Almost surely, 2^199430387 is an apocalyptic number.

199430387 is a deficient number, since it is larger than the sum of its proper divisors (15340813).

199430387 is a wasteful number, since it uses less digits than its factorization.

199430387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15340812.

The product of its (nonzero) digits is 163296, while the sum is 44.

The square root of 199430387 is about 14121.9824033313. The cubic root of 199430387 is about 584.2478335663.

The spelling of 199430387 in words is "one hundred ninety-nine million, four hundred thirty thousand, three hundred eighty-seven".