199741649 has 8 divisors (see below), whose sum is σ = 207237888. Its totient is φ = 192311280.

The previous prime is 199741643. The next prime is 199741657. The reversal of 199741649 is 946147991.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 199741649 - 2²⁰ = 198693073 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 199741597 and 199741606.

It is not an unprimeable number, because it can be changed into a prime (199741643) 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, 10247 + ... + 22460.

It is an arithmetic number, because the mean of its divisors is an integer number (25904736).

Almost surely, 2^199741649 is an apocalyptic number.

It is an amenable number.

199741649 is a deficient number, since it is larger than the sum of its proper divisors (7496239).

199741649 is a wasteful number, since it uses less digits than its factorization.

199741649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32935.

The product of its digits is 489888, while the sum is 50.

The square root of 199741649 is about 14132.9985848722. The cubic root of 199741649 is about 584.5516315045.

The spelling of 199741649 in words is "one hundred ninety-nine million, seven hundred forty-one thousand, six hundred forty-nine".