199489537 has 4 divisors (see below), whose sum is σ = 214834900. Its totient is φ = 184144176.

The previous prime is 199489523. The next prime is 199489567. The reversal of 199489537 is 735984991.

199489537 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 108076816 + 91412721 = 10396^2 + 9561^2 .

It is a cyclic number.

It is not a de Polignac number, because 199489537 - 2¹¹ = 199487489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (199489567) 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, 7672662 + ... + 7672687.

It is an arithmetic number, because the mean of its divisors is an integer number (53708725).

Almost surely, 2^199489537 is an apocalyptic number.

It is an amenable number.

199489537 is a deficient number, since it is larger than the sum of its proper divisors (15345363).

199489537 is a wasteful number, since it uses less digits than its factorization.

199489537 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15345362.

The product of its digits is 2449440, while the sum is 55.

The square root of 199489537 is about 14124.0765007840. The cubic root of 199489537 is about 584.3055894644.

The spelling of 199489537 in words is "one hundred ninety-nine million, four hundred eighty-nine thousand, five hundred thirty-seven".