197478427 has 8 divisors (see below), whose sum is σ = 202522320. Its totient is φ = 192445440.

The previous prime is 197478397. The next prime is 197478467. The reversal of 197478427 is 724874791.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 197478427 - 2¹⁹ = 196954139 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (197478467) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43899 + ... + 48187.

It is an arithmetic number, because the mean of its divisors is an integer number (25315290).

Almost surely, 2^197478427 is an apocalyptic number.

197478427 is a deficient number, since it is larger than the sum of its proper divisors (5043893).

197478427 is a wasteful number, since it uses less digits than its factorization.

197478427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5453.

The product of its digits is 790272, while the sum is 49.

The square root of 197478427 is about 14052.7017686991. The cubic root of 197478427 is about 582.3354378047.

The spelling of 197478427 in words is "one hundred ninety-seven million, four hundred seventy-eight thousand, four hundred twenty-seven".