199487823 has 8 divisors (see below), whose sum is σ = 266417328. Its totient is φ = 132775104.

The previous prime is 199487819. The next prime is 199487851. The reversal of 199487823 is 328784991.

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

It is not a de Polignac number, because 199487823 - 2² = 199487819 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (199487623) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 52036 + ... + 55737.

It is an arithmetic number, because the mean of its divisors is an integer number (33302166).

Almost surely, 2^199487823 is an apocalyptic number.

199487823 is a deficient number, since it is larger than the sum of its proper divisors (66929505).

199487823 is a wasteful number, since it uses less digits than its factorization.

199487823 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108393.

The product of its digits is 870912, while the sum is 51.

The square root of 199487823 is about 14124.0158241203. The cubic root of 199487823 is about 584.3039160221.

The spelling of 199487823 in words is "one hundred ninety-nine million, four hundred eighty-seven thousand, eight hundred twenty-three".