477643879 has 2 divisors, whose sum is σ = 477643880. Its totient is φ = 477643878.

The previous prime is 477643867. The next prime is 477643889. The reversal of 477643879 is 978346774.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 477643879 - 2²³ = 469255271 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (477643819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 238821939 + 238821940.

It is an arithmetic number, because the mean of its divisors is an integer number (238821940).

Almost surely, 2^477643879 is an apocalyptic number.

477643879 is a deficient number, since it is larger than the sum of its proper divisors (1).

477643879 is an equidigital number, since it uses as much as digits as its factorization.

477643879 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7112448, while the sum is 55.

The square root of 477643879 is about 21855.0652938855. The cubic root of 477643879 is about 781.6903288926.

The spelling of 477643879 in words is "four hundred seventy-seven million, six hundred forty-three thousand, eight hundred seventy-nine".