478372499 has 4 divisors (see below), whose sum is σ = 521860920. Its totient is φ = 434884080.

The previous prime is 478372493. The next prime is 478372513. The reversal of 478372499 is 994273874.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 478372499 - 2⁴ = 478372483 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 478372499.

It is not an unprimeable number, because it can be changed into a prime (478372493) 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 3 ways as a sum of consecutive naturals, for example, 21744194 + ... + 21744215.

It is an arithmetic number, because the mean of its divisors is an integer number (130465230).

Almost surely, 2^478372499 is an apocalyptic number.

478372499 is a deficient number, since it is larger than the sum of its proper divisors (43488421).

478372499 is a wasteful number, since it uses less digits than its factorization.

478372499 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43488420.

The product of its digits is 3048192, while the sum is 53.

The square root of 478372499 is about 21871.7283039087. The cubic root of 478372499 is about 782.0876024466.

The spelling of 478372499 in words is "four hundred seventy-eight million, three hundred seventy-two thousand, four hundred ninety-nine".