478442197 has 4 divisors (see below), whose sum is σ = 478486080. Its totient is φ = 478398316.

The previous prime is 478442191. The next prime is 478442201. The reversal of 478442197 is 791244874.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 478442197 - 2²⁷ = 344224469 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (478442191) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8388 + ... + 32050.

It is an arithmetic number, because the mean of its divisors is an integer number (119621520).

Almost surely, 2^478442197 is an apocalyptic number.

It is an amenable number.

478442197 is a deficient number, since it is larger than the sum of its proper divisors (43883).

478442197 is a wasteful number, since it uses less digits than its factorization.

478442197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43882.

The product of its digits is 451584, while the sum is 46.

The square root of 478442197 is about 21873.3215813237. The cubic root of 478442197 is about 782.1255835142.

The spelling of 478442197 in words is "four hundred seventy-eight million, four hundred forty-two thousand, one hundred ninety-seven".