1720744315 has 8 divisors (see below), whose sum is σ = 2070286848. Its totient is φ = 1372999680.

The previous prime is 1720744309. The next prime is 1720744351. The reversal of 1720744315 is 5134470271.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1720744315 - 2²¹ = 1718647163 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 447366 + ... + 451195.

It is an arithmetic number, because the mean of its divisors is an integer number (258785856).

Almost surely, 2^1720744315 is an apocalyptic number.

1720744315 is a deficient number, since it is larger than the sum of its proper divisors (349542533).

1720744315 is an equidigital number, since it uses as much as digits as its factorization.

1720744315 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 898949.

The product of its (nonzero) digits is 23520, while the sum is 34.

The square root of 1720744315 is about 41481.8552502175. The cubic root of 1720744315 is about 1198.3180870290.

The spelling of 1720744315 in words is "one billion, seven hundred twenty million, seven hundred forty-four thousand, three hundred fifteen".