478147751 has 4 divisors (see below), whose sum is σ = 493571904. Its totient is φ = 462723600.

The previous prime is 478147697. The next prime is 478147771. The reversal of 478147751 is 157741874.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-478147751 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 (478147771) 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, 7712030 + ... + 7712091.

It is an arithmetic number, because the mean of its divisors is an integer number (123392976).

Almost surely, 2^478147751 is an apocalyptic number.

478147751 is a deficient number, since it is larger than the sum of its proper divisors (15424153).

478147751 is a wasteful number, since it uses less digits than its factorization.

478147751 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15424152.

The product of its digits is 219520, while the sum is 44.

The square root of 478147751 is about 21866.5898347227. The cubic root of 478147751 is about 781.9651036553.

The spelling of 478147751 in words is "four hundred seventy-eight million, one hundred forty-seven thousand, seven hundred fifty-one".