197279998 has 4 divisors (see below), whose sum is σ = 295920000. Its totient is φ = 98639998.

The previous prime is 197279989. The next prime is 197280037. The reversal of 197279998 is 899972791.

197279998 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: 899972791 = 19 ⋅47366989.

It is a super-2 number, since 2×197279998² = 77838795221760008, which contains 22 as substring.

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, 49319998 + ... + 49320001.

It is an arithmetic number, because the mean of its divisors is an integer number (73980000).

Almost surely, 2^197279998 is an apocalyptic number.

197279998 is a deficient number, since it is larger than the sum of its proper divisors (98640002).

197279998 is an equidigital number, since it uses as much as digits as its factorization.

197279998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98640001.

The product of its digits is 5143824, while the sum is 61.

The square root of 197279998 is about 14045.6398216671. The cubic root of 197279998 is about 582.1403262597.

The spelling of 197279998 in words is "one hundred ninety-seven million, two hundred seventy-nine thousand, nine hundred ninety-eight".