197478394 has 8 divisors (see below), whose sum is σ = 297072288. Its totient is φ = 98454300.

The previous prime is 197478373. The next prime is 197478397. The reversal of 197478394 is 493874791.

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

It is not an unprimeable number, because it can be changed into a prime (197478397) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 141582 + ... + 142969.

It is an arithmetic number, because the mean of its divisors is an integer number (37134036).

Almost surely, 2^197478394 is an apocalyptic number.

197478394 is a deficient number, since it is larger than the sum of its proper divisors (99593894).

197478394 is a wasteful number, since it uses less digits than its factorization.

197478394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 284900.

The product of its digits is 1524096, while the sum is 52.

The square root of 197478394 is about 14052.7005945477. The cubic root of 197478394 is about 582.3354053673.

The spelling of 197478394 in words is "one hundred ninety-seven million, four hundred seventy-eight thousand, three hundred ninety-four".