479785217 has 4 divisors (see below), whose sum is σ = 480893700. Its totient is φ = 478676736.

The previous prime is 479785213. The next prime is 479785247. The reversal of 479785217 is 712587974.

It is a happy number.

It is a Cunningham number, because it is equal to 148⁴+1.

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 53816896 + 425968321 = 7336^2 + 20639^2 .

It is a cyclic number.

It is not a de Polignac number, because 479785217 - 2² = 479785213 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (479785211) 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, 553592 + ... + 554457.

It is an arithmetic number, because the mean of its divisors is an integer number (120223425).

Almost surely, 2^479785217 is an apocalyptic number.

It is an amenable number.

479785217 is a deficient number, since it is larger than the sum of its proper divisors (1108483).

479785217 is a wasteful number, since it uses less digits than its factorization.

479785217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1108482.

The product of its digits is 987840, while the sum is 50.

The square root of 479785217 is about 21904.0000228269. Note that the first 4 decimals coincide. The cubic root of 479785217 is about 782.8567265026.

The spelling of 479785217 in words is "four hundred seventy-nine million, seven hundred eighty-five thousand, two hundred seventeen".