199861372 has 6 divisors (see below), whose sum is σ = 349757408. Its totient is φ = 99930684.

The previous prime is 199861349. The next prime is 199861373. The reversal of 199861372 is 273168991.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (199861373) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24982668 + ... + 24982675.

Almost surely, 2^199861372 is an apocalyptic number.

It is an amenable number.

199861372 is a deficient number, since it is larger than the sum of its proper divisors (149896036).

199861372 is a wasteful number, since it uses less digits than its factorization.

199861372 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49965347 (or 49965345 counting only the distinct ones).

The product of its digits is 163296, while the sum is 46.

The square root of 199861372 is about 14137.2335341820. The cubic root of 199861372 is about 584.6683995019.

The spelling of 199861372 in words is "one hundred ninety-nine million, eight hundred sixty-one thousand, three hundred seventy-two".