475811979 has 4 divisors (see below), whose sum is σ = 634415976. Its totient is φ = 317207984.

The previous prime is 475811951. The next prime is 475811983. The reversal of 475811979 is 979118574.

It is a happy number.

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 475811979 - 2²¹ = 473714827 is a prime.

It is a nialpdrome in base 13.

It is a zygodrome in base 13.

It is not an unprimeable number, because it can be changed into a prime (475811989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 79301994 + ... + 79301999.

It is an arithmetic number, because the mean of its divisors is an integer number (158603994).

Almost surely, 2^475811979 is an apocalyptic number.

475811979 is a deficient number, since it is larger than the sum of its proper divisors (158603997).

475811979 is a wasteful number, since it uses less digits than its factorization.

475811979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 158603996.

The product of its digits is 635040, while the sum is 51.

The square root of 475811979 is about 21813.1148394721. The cubic root of 475811979 is about 780.6897137421.

The spelling of 475811979 in words is "four hundred seventy-five million, eight hundred eleven thousand, nine hundred seventy-nine".