1720473939113 has 4 divisors (see below), whose sum is σ = 1721089055940. Its totient is φ = 1719858822288.

The previous prime is 1720473939109. The next prime is 1720473939127. The reversal of 1720473939113 is 3119393740271.

It is a happy number.

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 1446554641984 + 273919297129 = 1202728^2 + 523373^2 .

It is a cyclic number.

It is not a de Polignac number, because 1720473939113 - 2² = 1720473939109 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1720473939143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 307554218 + ... + 307559811.

It is an arithmetic number, because the mean of its divisors is an integer number (430272263985).

Almost surely, 2^{1720473939113} is an apocalyptic number.

It is an amenable number.

1720473939113 is a deficient number, since it is larger than the sum of its proper divisors (615116827).

1720473939113 is an equidigital number, since it uses as much as digits as its factorization.

1720473939113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 615116826.

The product of its (nonzero) digits is 857304, while the sum is 50.

The spelling of 1720473939113 in words is "one trillion, seven hundred twenty billion, four hundred seventy-three million, nine hundred thirty-nine thousand, one hundred thirteen".