199407387 has 8 divisors (see below), whose sum is σ = 265963536. Its totient is φ = 132894752.

The previous prime is 199407379. The next prime is 199407419. The reversal of 199407387 is 783704991.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 199407387 - 2³ = 199407379 is a prime.

It is not an unprimeable number, because it can be changed into a prime (199407317) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1993 + ... + 20069.

It is an arithmetic number, because the mean of its divisors is an integer number (33245442).

Almost surely, 2^199407387 is an apocalyptic number.

199407387 is a deficient number, since it is larger than the sum of its proper divisors (66556149).

199407387 is a wasteful number, since it uses less digits than its factorization.

199407387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21757.

The product of its (nonzero) digits is 381024, while the sum is 48.

The square root of 199407387 is about 14121.1680465888. The cubic root of 199407387 is about 584.2253725679.

The spelling of 199407387 in words is "one hundred ninety-nine million, four hundred seven thousand, three hundred eighty-seven".