199247894 has 8 divisors (see below), whose sum is σ = 301953288. Its totient is φ = 98596800.

The previous prime is 199247863. The next prime is 199247903. The reversal of 199247894 is 498742991.

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

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 513332 + ... + 513719.

It is an arithmetic number, because the mean of its divisors is an integer number (37744161).

Almost surely, 2^199247894 is an apocalyptic number.

199247894 is a deficient number, since it is larger than the sum of its proper divisors (102705394).

199247894 is a wasteful number, since it uses less digits than its factorization.

199247894 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1027150.

The product of its digits is 1306368, while the sum is 53.

The square root of 199247894 is about 14115.5196149486. The cubic root of 199247894 is about 584.0695697286.

The spelling of 199247894 in words is "one hundred ninety-nine million, two hundred forty-seven thousand, eight hundred ninety-four".