478954491 has 4 divisors (see below), whose sum is σ = 638605992. Its totient is φ = 319302992.

The previous prime is 478954453. The next prime is 478954499. The reversal of 478954491 is 194459874.

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 478954491 - 2¹⁰ = 478953467 is a prime.

It is not an unprimeable number, because it can be changed into a prime (478954499) 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, 79825746 + ... + 79825751.

It is an arithmetic number, because the mean of its divisors is an integer number (159651498).

Almost surely, 2^478954491 is an apocalyptic number.

478954491 is a deficient number, since it is larger than the sum of its proper divisors (159651501).

478954491 is a wasteful number, since it uses less digits than its factorization.

478954491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159651500.

The product of its digits is 1451520, while the sum is 51.

The square root of 478954491 is about 21885.0289239014. The cubic root of 478954491 is about 782.4046386936.

The spelling of 478954491 in words is "four hundred seventy-eight million, nine hundred fifty-four thousand, four hundred ninety-one".