479221609 has 4 divisors (see below), whose sum is σ = 481654404. Its totient is φ = 476788816.

The previous prime is 479221579. The next prime is 479221643. The reversal of 479221609 is 906122974.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 906122974 = 2 ⋅453061487.

It can be written as a sum of positive squares in 2 ways, for example, as 474368400 + 4853209 = 21780^2 + 2203^2 .

It is a cyclic number.

It is not a de Polignac number, because 479221609 - 2¹³ = 479213417 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (479221709) 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, 1216102 + ... + 1216495.

It is an arithmetic number, because the mean of its divisors is an integer number (120413601).

Almost surely, 2^479221609 is an apocalyptic number.

It is an amenable number.

479221609 is a deficient number, since it is larger than the sum of its proper divisors (2432795).

479221609 is a wasteful number, since it uses less digits than its factorization.

479221609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2432794.

The product of its (nonzero) digits is 54432, while the sum is 40.

The square root of 479221609 is about 21891.1308296305. The cubic root of 479221609 is about 782.5500634507.

The spelling of 479221609 in words is "four hundred seventy-nine million, two hundred twenty-one thousand, six hundred nine".