199037493 has 40 divisors (see below), whose sum is σ = 309127896. Its totient is φ = 127526400.

The previous prime is 199037491. The next prime is 199037539. The reversal of 199037493 is 394730991.

199037493 is a `hidden beast` number, since 199 + 0 + 374 + 93 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 142884 + 198894609 = 378^2 + 14103^2 .

It is not a de Polignac number, because 199037493 - 2¹ = 199037491 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (199037491) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 242023 + ... + 242843.

Almost surely, 2^199037493 is an apocalyptic number.

It is an amenable number.

199037493 is a deficient number, since it is larger than the sum of its proper divisors (110090403).

199037493 is an equidigital number, since it uses as much as digits as its factorization.

199037493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 947 (or 938 counting only the distinct ones).

The product of its (nonzero) digits is 183708, while the sum is 45.

The square root of 199037493 is about 14108.0648212290. The cubic root of 199037493 is about 583.8639094991.

The spelling of 199037493 in words is "one hundred ninety-nine million, thirty-seven thousand, four hundred ninety-three".