197839956 has 12 divisors (see below), whose sum is σ = 461626592. Its totient is φ = 65946648.

The previous prime is 197839949. The next prime is 197839973. The reversal of 197839956 is 659938791.

197839956 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (12).

It is a junction number, because it is equal to n+sod(n) for n = 197839896 and 197839905.

It is a congruent number.

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, 8243320 + ... + 8243343.

Almost surely, 2^197839956 is an apocalyptic number.

It is an amenable number.

197839956 is an abundant number, since it is smaller than the sum of its proper divisors (263786636).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

197839956 is a wasteful number, since it uses less digits than its factorization.

197839956 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16486670 (or 16486668 counting only the distinct ones).

The product of its digits is 3674160, while the sum is 57.

The square root of 197839956 is about 14065.5592139097. The cubic root of 197839956 is about 582.6905868155.

The spelling of 197839956 in words is "one hundred ninety-seven million, eight hundred thirty-nine thousand, nine hundred fifty-six".