478093821 has 4 divisors (see below), whose sum is σ = 637458432. Its totient is φ = 318729212.

The previous prime is 478093813. The next prime is 478093829. The reversal of 478093821 is 128390874.

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.

It is an interprime number because it is at equal distance from previous prime (478093813) and next prime (478093829).

It is a cyclic number.

It is not a de Polignac number, because 478093821 - 2³ = 478093813 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (478093829) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 79682301 + ... + 79682306.

It is an arithmetic number, because the mean of its divisors is an integer number (159364608).

Almost surely, 2^478093821 is an apocalyptic number.

It is an amenable number.

478093821 is a deficient number, since it is larger than the sum of its proper divisors (159364611).

478093821 is a wasteful number, since it uses less digits than its factorization.

478093821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159364610.

The product of its (nonzero) digits is 96768, while the sum is 42.

The square root of 478093821 is about 21865.3566401282. The cubic root of 478093821 is about 781.9357034239.

The spelling of 478093821 in words is "four hundred seventy-eight million, ninety-three thousand, eight hundred twenty-one".