198481537 has 4 divisors (see below), whose sum is σ = 201444016. Its totient is φ = 195519060.

The previous prime is 198481529. The next prime is 198481553. The reversal of 198481537 is 735184891.

It is a happy number.

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 a cyclic number.

It is not a de Polignac number, because 198481537 - 2³ = 198481529 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (198481567) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1481139 + ... + 1481272.

It is an arithmetic number, because the mean of its divisors is an integer number (50361004).

Almost surely, 2^198481537 is an apocalyptic number.

It is an amenable number.

198481537 is a deficient number, since it is larger than the sum of its proper divisors (2962479).

198481537 is an equidigital number, since it uses as much as digits as its factorization.

198481537 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2962478.

The product of its digits is 241920, while the sum is 46.

The square root of 198481537 is about 14088.3475610165. The cubic root of 198481537 is about 583.3197819618.

It can be divided in two parts, 1984 and 81537, that added together give a 4-th power (83521 = 17⁴).

The spelling of 198481537 in words is "one hundred ninety-eight million, four hundred eighty-one thousand, five hundred thirty-seven".