199931774 has 12 divisors (see below), whose sum is σ = 342830904. Its totient is φ = 85662372.

The previous prime is 199931761. The next prime is 199931777. The reversal of 199931774 is 477139991.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (199931777) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 51017 + ... + 54795.

It is an arithmetic number, because the mean of its divisors is an integer number (28569242).

Almost surely, 2^199931774 is an apocalyptic number.

199931774 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

199931774 is a deficient number, since it is larger than the sum of its proper divisors (142899130).

199931774 is an frugal number, since it uses more digits than its factorization.

199931774 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7567 (or 3788 counting only the distinct ones).

The product of its digits is 428652, while the sum is 50.

The square root of 199931774 is about 14139.7232646187. The cubic root of 199931774 is about 584.7370420682.

The spelling of 199931774 in words is "one hundred ninety-nine million, nine hundred thirty-one thousand, seven hundred seventy-four".