199448137 has 4 divisors (see below), whose sum is σ = 227940736. Its totient is φ = 170955540.

The previous prime is 199448113. The next prime is 199448153. The reversal of 199448137 is 731844991.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 199448137 - 2¹¹ = 199446089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (199442137) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14246289 + ... + 14246302.

It is an arithmetic number, because the mean of its divisors is an integer number (56985184).

Almost surely, 2^199448137 is an apocalyptic number.

It is an amenable number.

199448137 is a deficient number, since it is larger than the sum of its proper divisors (28492599).

199448137 is an equidigital number, since it uses as much as digits as its factorization.

199448137 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28492598.

The product of its digits is 217728, while the sum is 46.

The square root of 199448137 is about 14122.6108421920. The cubic root of 199448137 is about 584.2651664170.

The spelling of 199448137 in words is "one hundred ninety-nine million, four hundred forty-eight thousand, one hundred thirty-seven".