4478917687 has 4 divisors (see below), whose sum is σ = 4574213856. Its totient is φ = 4383621520.

The previous prime is 4478917669. The next prime is 4478917717. The reversal of 4478917687 is 7867198744.

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 4478917687 - 2⁷ = 4478917559 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 (4478917987) 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, 47648014 + ... + 47648107.

It is an arithmetic number, because the mean of its divisors is an integer number (1143553464).

Almost surely, 2^4478917687 is an apocalyptic number.

4478917687 is a gapful number since it is divisible by the number (47) formed by its first and last digit.

4478917687 is a deficient number, since it is larger than the sum of its proper divisors (95296169).

4478917687 is an equidigital number, since it uses as much as digits as its factorization.

4478917687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95296168.

The product of its digits is 18966528, while the sum is 61.

The square root of 4478917687 is about 66924.7165627169. The cubic root of 4478917687 is about 1648.3813556405.

The spelling of 4478917687 in words is "four billion, four hundred seventy-eight million, nine hundred seventeen thousand, six hundred eighty-seven".