198259742 has 4 divisors (see below), whose sum is σ = 297389616. Its totient is φ = 99129870.

The previous prime is 198259717. The next prime is 198259753. The reversal of 198259742 is 247952891.

198259742 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, and also an emirpimes, since its reverse is a distinct semiprime: 247952891 = 773 ⋅320767.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49564934 + ... + 49564937.

It is an arithmetic number, because the mean of its divisors is an integer number (74347404).

Almost surely, 2^198259742 is an apocalyptic number.

198259742 is a deficient number, since it is larger than the sum of its proper divisors (99129874).

198259742 is an equidigital number, since it uses as much as digits as its factorization.

198259742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99129873.

The product of its digits is 362880, while the sum is 47.

The square root of 198259742 is about 14080.4737846423. The cubic root of 198259742 is about 583.1024223117.

The spelling of 198259742 in words is "one hundred ninety-eight million, two hundred fifty-nine thousand, seven hundred forty-two".