478771877 has 4 divisors (see below), whose sum is σ = 478905900. Its totient is φ = 478637856.

The previous prime is 478771873. The next prime is 478771879. The reversal of 478771877 is 778177874.

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

It can be written as a sum of positive squares in 2 ways, for example, as 59382436 + 419389441 = 7706^2 + 20479^2 .

It is a cyclic number.

It is not a de Polignac number, because 478771877 - 2² = 478771873 is a prime.

It is a super-2 number, since 2×478771877² = 458445020412206258, 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 (478771873) 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, 61502 + ... + 68847.

It is an arithmetic number, because the mean of its divisors is an integer number (119726475).

Almost surely, 2^478771877 is an apocalyptic number.

It is an amenable number.

478771877 is a deficient number, since it is larger than the sum of its proper divisors (134023).

478771877 is a wasteful number, since it uses less digits than its factorization.

478771877 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134022.

The product of its digits is 4302592, while the sum is 56.

The square root of 478771877 is about 21880.8564046291. The cubic root of 478771877 is about 782.3051886025.

The spelling of 478771877 in words is "four hundred seventy-eight million, seven hundred seventy-one thousand, eight hundred seventy-seven".