478864709 has 4 divisors (see below), whose sum is σ = 486981120. Its totient is φ = 470748300.

The previous prime is 478864703. The next prime is 478864747. The reversal of 478864709 is 907468874.

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 478864709 - 2⁸ = 478864453 is a prime.

It is a super-2 number, since 2×478864709² = 458622819051309362, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (478864703) 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, 4058117 + ... + 4058234.

It is an arithmetic number, because the mean of its divisors is an integer number (121745280).

Almost surely, 2^478864709 is an apocalyptic number.

It is an amenable number.

478864709 is a deficient number, since it is larger than the sum of its proper divisors (8116411).

478864709 is an equidigital number, since it uses as much as digits as its factorization.

478864709 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8116410.

The product of its (nonzero) digits is 2709504, while the sum is 53.

The square root of 478864709 is about 21882.9776081775. The cubic root of 478864709 is about 782.3557473101.

The spelling of 478864709 in words is "four hundred seventy-eight million, eight hundred sixty-four thousand, seven hundred nine".