478722001 has 4 divisors (see below), whose sum is σ = 480005812. Its totient is φ = 477438192.

The previous prime is 478721993. The next prime is 478722007. The reversal of 478722001 is 100227874.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 100227874 = 2 ⋅50113937.

It can be written as a sum of positive squares in 2 ways, for example, as 166281025 + 312440976 = 12895^2 + 17676^2 .

It is a cyclic number.

It is not a de Polignac number, because 478722001 - 2³ = 478721993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (478722007) 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, 641346 + ... + 642091.

It is an arithmetic number, because the mean of its divisors is an integer number (120001453).

Almost surely, 2^478722001 is an apocalyptic number.

It is an amenable number.

478722001 is a deficient number, since it is larger than the sum of its proper divisors (1283811).

478722001 is a wasteful number, since it uses less digits than its factorization.

478722001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1283810.

The product of its (nonzero) digits is 6272, while the sum is 31.

The square root of 478722001 is about 21879.7166572147. The cubic root of 478722001 is about 782.2780221443.

Adding to 478722001 its reverse (100227874), we get a palindrome (578949875).

The spelling of 478722001 in words is "four hundred seventy-eight million, seven hundred twenty-two thousand, one".