197398655 has 4 divisors (see below), whose sum is σ = 236878392. Its totient is φ = 157918920.

The previous prime is 197398639. The next prime is 197398667. The reversal of 197398655 is 556893791.

197398655 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: 556893791 = 23099 ⋅24109.

It is not a de Polignac number, because 197398655 - 2⁴ = 197398639 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 197398597 and 197398606.

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, 19739861 + ... + 19739870.

It is an arithmetic number, because the mean of its divisors is an integer number (59219598).

Almost surely, 2^197398655 is an apocalyptic number.

197398655 is a deficient number, since it is larger than the sum of its proper divisors (39479737).

197398655 is an equidigital number, since it uses as much as digits as its factorization.

197398655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39479736.

The product of its digits is 2041200, while the sum is 53.

The square root of 197398655 is about 14049.8631665935. The cubic root of 197398655 is about 582.2570151980.

It can be divided in two parts, 1973 and 98655, that multiplied together give a triangular number (194646315 = T₁₉₇₃₀).

The spelling of 197398655 in words is "one hundred ninety-seven million, three hundred ninety-eight thousand, six hundred fifty-five".