197479138 has 8 divisors (see below), whose sum is σ = 304224732. Its totient is φ = 96070896.

The previous prime is 197479069. The next prime is 197479151. The reversal of 197479138 is 831974791.

197479138 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 162231169 + 35247969 = 12737^2 + 5937^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 197479091 and 197479100.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1334245 + ... + 1334392.

Almost surely, 2^197479138 is an apocalyptic number.

197479138 is a deficient number, since it is larger than the sum of its proper divisors (106745594).

197479138 is a wasteful number, since it uses less digits than its factorization.

197479138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2668676.

The product of its digits is 381024, while the sum is 49.

The square root of 197479138 is about 14052.7270663028. The cubic root of 197479138 is about 582.3361366828.

The spelling of 197479138 in words is "one hundred ninety-seven million, four hundred seventy-nine thousand, one hundred thirty-eight".