1721716479 has 84 divisors (see below), whose sum is σ = 3031815864. Its totient is φ = 974387232.

The previous prime is 1721716427. The next prime is 1721716489. The reversal of 1721716479 is 9746171271.

1721716479 is a `hidden beast` number, since 1 + 7 + 2 + 171 + 6 + 479 = 666.

It is not a de Polignac number, because 1721716479 - 2²¹ = 1719619327 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1721716489) by changing a digit.

It is a polite number, since it can be written in 83 ways as a sum of consecutive naturals, for example, 5608044 + ... + 5608350.

It is an arithmetic number, because the mean of its divisors is an integer number (36093046).

Almost surely, 2^1721716479 is an apocalyptic number.

1721716479 is a deficient number, since it is larger than the sum of its proper divisors (1310099385).

1721716479 is an equidigital number, since it uses as much as digits as its factorization.

1721716479 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 496 (or 474 counting only the distinct ones).

The product of its digits is 148176, while the sum is 45.

The square root of 1721716479 is about 41493.5715382516. The cubic root of 1721716479 is about 1198.5437146591.

The spelling of 1721716479 in words is "one billion, seven hundred twenty-one million, seven hundred sixteen thousand, four hundred seventy-nine".