199412678 has 8 divisors (see below), whose sum is σ = 299256672. Its totient is φ = 99660456.

The previous prime is 199412651. The next prime is 199412687. The reversal of 199412678 is 876214991.

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

It is a super-2 number, since 2×199412678² = 79530832294263368, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17225 + ... + 26372.

It is an arithmetic number, because the mean of its divisors is an integer number (37407084).

Almost surely, 2^199412678 is an apocalyptic number.

199412678 is a deficient number, since it is larger than the sum of its proper divisors (99843994).

199412678 is a wasteful number, since it uses less digits than its factorization.

199412678 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45886.

The product of its digits is 217728, while the sum is 47.

The square root of 199412678 is about 14121.3553882055. The cubic root of 199412678 is about 584.2305397271.

The spelling of 199412678 in words is "one hundred ninety-nine million, four hundred twelve thousand, six hundred seventy-eight".