197874478 has 4 divisors (see below), whose sum is σ = 296811720. Its totient is φ = 98937238.

The previous prime is 197874437. The next prime is 197874499. The reversal of 197874478 is 874478791.

It is a semiprime because it is the product of two primes.

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, 49468618 + ... + 49468621.

It is an arithmetic number, because the mean of its divisors is an integer number (74202930).

Almost surely, 2^197874478 is an apocalyptic number.

197874478 is a deficient number, since it is larger than the sum of its proper divisors (98937242).

197874478 is an equidigital number, since it uses as much as digits as its factorization.

197874478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98937241.

The product of its digits is 3161088, while the sum is 55.

The square root of 197874478 is about 14066.7863423029. The cubic root of 197874478 is about 582.7244769608.

The spelling of 197874478 in words is "one hundred ninety-seven million, eight hundred seventy-four thousand, four hundred seventy-eight".