199131737 has 20 divisors (see below), whose sum is σ = 234040356. Its totient is φ = 169414560.

The previous prime is 199131731. The next prime is 199131749. The reversal of 199131737 is 737131991.

It can be written as a sum of positive squares in 2 ways, for example, as 92236816 + 106894921 = 9604^2 + 10339^2 .

It is not a de Polignac number, because 199131737 - 2⁸ = 199131481 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 199131694 and 199131703.

It is not an unprimeable number, because it can be changed into a prime (199131731) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 472787 + ... + 473207.

Almost surely, 2^199131737 is an apocalyptic number.

It is an amenable number.

199131737 is a deficient number, since it is larger than the sum of its proper divisors (34908619).

199131737 is an frugal number, since it uses more digits than its factorization.

199131737 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 646 (or 625 counting only the distinct ones).

The product of its digits is 35721, while the sum is 41.

The square root of 199131737 is about 14111.4045013245. The cubic root of 199131737 is about 583.9560478979.

The spelling of 199131737 in words is "one hundred ninety-nine million, one hundred thirty-one thousand, seven hundred thirty-seven".