198148737 has 4 divisors (see below), whose sum is σ = 264198320. Its totient is φ = 132099156.

The previous prime is 198148733. The next prime is 198148747. The reversal of 198148737 is 737841891.

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 198148737 - 2² = 198148733 is a prime.

It is a super-3 number, since 3×198148737³ (a number of 26 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (198148733) 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, 33024787 + ... + 33024792.

It is an arithmetic number, because the mean of its divisors is an integer number (66049580).

Almost surely, 2^198148737 is an apocalyptic number.

It is an amenable number.

198148737 is a deficient number, since it is larger than the sum of its proper divisors (66049583).

198148737 is an equidigital number, since it uses as much as digits as its factorization.

198148737 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66049582.

The product of its digits is 338688, while the sum is 48.

The square root of 198148737 is about 14076.5314264559. The cubic root of 198148737 is about 582.9935762635.

The spelling of 198148737 in words is "one hundred ninety-eight million, one hundred forty-eight thousand, seven hundred thirty-seven".