1720604613 has 64 divisors (see below), whose sum is σ = 2887926272. Its totient is φ = 887086080.

The previous prime is 1720604581. The next prime is 1720604617. The reversal of 1720604613 is 3164060271.

It is not a de Polignac number, because 1720604613 - 2⁵ = 1720604581 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1720604617) by changing a digit.

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 63 ways as a sum of consecutive naturals, for example, 4612695 + ... + 4613067.

It is an arithmetic number, because the mean of its divisors is an integer number (45123848).

Almost surely, 2^1720604613 is an apocalyptic number.

1720604613 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1720604613 is a deficient number, since it is larger than the sum of its proper divisors (1167321659).

1720604613 is a wasteful number, since it uses less digits than its factorization.

1720604613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 734.

The product of its (nonzero) digits is 6048, while the sum is 30.

The square root of 1720604613 is about 41480.1713231756. The cubic root of 1720604613 is about 1198.2856568838.

Adding to 1720604613 its reverse (3164060271), we get a palindrome (4884664884).

The spelling of 1720604613 in words is "one billion, seven hundred twenty million, six hundred four thousand, six hundred thirteen".