478978133 has 4 divisors (see below), whose sum is σ = 479061600. Its totient is φ = 478894668.

The previous prime is 478978121. The next prime is 478978139. The reversal of 478978133 is 331879874.

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 a cyclic number.

It is not a de Polignac number, because 478978133 - 2⁶ = 478978069 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 (478978139) 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, 32435 + ... + 44832.

It is an arithmetic number, because the mean of its divisors is an integer number (119765400).

Almost surely, 2^478978133 is an apocalyptic number.

It is an amenable number.

478978133 is a deficient number, since it is larger than the sum of its proper divisors (83467).

478978133 is an equidigital number, since it uses as much as digits as its factorization.

478978133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83466.

The product of its digits is 1016064, while the sum is 50.

The square root of 478978133 is about 21885.5690581716. The cubic root of 478978133 is about 782.4175120852.

The spelling of 478978133 in words is "four hundred seventy-eight million, nine hundred seventy-eight thousand, one hundred thirty-three".