199549942 has 16 divisors (see below), whose sum is σ = 304636464. Its totient is φ = 98020000.

The previous prime is 199549939. The next prime is 199549997. The reversal of 199549942 is 249945991.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 199549942.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22692 + ... + 30232.

It is an arithmetic number, because the mean of its divisors is an integer number (19039779).

Almost surely, 2^199549942 is an apocalyptic number.

199549942 is a deficient number, since it is larger than the sum of its proper divisors (105086522).

199549942 is a wasteful number, since it uses less digits than its factorization.

199549942 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7775.

The product of its digits is 1049760, while the sum is 52.

The square root of 199549942 is about 14126.2147088312. The cubic root of 199549942 is about 584.3645590021.

The spelling of 199549942 in words is "one hundred ninety-nine million, five hundred forty-nine thousand, nine hundred forty-two".