478968689 has 4 divisors (see below), whose sum is σ = 482740224. Its totient is φ = 475197156.

The previous prime is 478968673. The next prime is 478968703. The reversal of 478968689 is 986869874.

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 an emirpimes, since its reverse is a distinct semiprime: 986869874 = 2 ⋅493434937.

It is a cyclic number.

It is not a de Polignac number, because 478968689 - 2⁴ = 478968673 is a prime.

It is a super-2 number, since 2×478968689² = 458822010084757442, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (478968649) 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, 1885577 + ... + 1885830.

It is an arithmetic number, because the mean of its divisors is an integer number (120685056).

Almost surely, 2^478968689 is an apocalyptic number.

It is an amenable number.

478968689 is a deficient number, since it is larger than the sum of its proper divisors (3771535).

478968689 is a wasteful number, since it uses less digits than its factorization.

478968689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3771534.

The product of its digits is 41803776, while the sum is 65.

The square root of 478968689 is about 21885.3532984962. The cubic root of 478968689 is about 782.4123697491.

The spelling of 478968689 in words is "four hundred seventy-eight million, nine hundred sixty-eight thousand, six hundred eighty-nine".