197668478 has 8 divisors (see below), whose sum is σ = 338860272. Its totient is φ = 84715056.

The previous prime is 197668453. The next prime is 197668481. The reversal of 197668478 is 874866791.

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

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, 7059575 + ... + 7059602.

It is an arithmetic number, because the mean of its divisors is an integer number (42357534).

Almost surely, 2^197668478 is an apocalyptic number.

197668478 is a deficient number, since it is larger than the sum of its proper divisors (141191794).

197668478 is a wasteful number, since it uses less digits than its factorization.

197668478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14119186.

The product of its digits is 4064256, while the sum is 56.

The square root of 197668478 is about 14059.4622230013. The cubic root of 197668478 is about 582.5221889170.

The spelling of 197668478 in words is "one hundred ninety-seven million, six hundred sixty-eight thousand, four hundred seventy-eight".