198734479 has 4 divisors (see below), whose sum is σ = 202102920. Its totient is φ = 195366040.

The previous prime is 198734447. The next prime is 198734489. The reversal of 198734479 is 974437891.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 974437891 = 7 ⋅139205413.

It is a cyclic number.

It is not a de Polignac number, because 198734479 - 2⁵ = 198734447 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198734489) 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, 1684132 + ... + 1684249.

It is an arithmetic number, because the mean of its divisors is an integer number (50525730).

Almost surely, 2^198734479 is an apocalyptic number.

198734479 is a deficient number, since it is larger than the sum of its proper divisors (3368441).

198734479 is an equidigital number, since it uses as much as digits as its factorization.

198734479 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3368440.

The product of its digits is 1524096, while the sum is 52.

The square root of 198734479 is about 14097.3216959818. The cubic root of 198734479 is about 583.5674682068.

The spelling of 198734479 in words is "one hundred ninety-eight million, seven hundred thirty-four thousand, four hundred seventy-nine".