199372539 has 16 divisors (see below), whose sum is σ = 275844128. Its totient is φ = 127982592.

The previous prime is 199372531. The next prime is 199372559. The reversal of 199372539 is 935273991.

It is not a de Polignac number, because 199372539 - 2³ = 199372531 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (199372531) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1509 + ... + 20025.

It is an arithmetic number, because the mean of its divisors is an integer number (17240258).

Almost surely, 2^199372539 is an apocalyptic number.

199372539 is a deficient number, since it is larger than the sum of its proper divisors (76471589).

199372539 is a wasteful number, since it uses less digits than its factorization.

199372539 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18654.

The product of its digits is 459270, while the sum is 48.

The square root of 199372539 is about 14119.9341004128. The cubic root of 199372539 is about 584.1913379346.

The spelling of 199372539 in words is "one hundred ninety-nine million, three hundred seventy-two thousand, five hundred thirty-nine".