3721972759313 has 4 divisors (see below), whose sum is σ = 3722058734628. Its totient is φ = 3721886784000.

The previous prime is 3721972759229. The next prime is 3721972759381. The reversal of 3721972759313 is 3139572791273.

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 3568502346304 + 153470413009 = 1889048^2 + 391753^2 .

It is a cyclic number.

It is not a de Polignac number, because 3721972759313 - 2¹² = 3721972755217 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3721972759013) 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, 42922688 + ... + 43009313.

It is an arithmetic number, because the mean of its divisors is an integer number (930514683657).

Almost surely, 2^{3721972759313} is an apocalyptic number.

It is an amenable number.

3721972759313 is a deficient number, since it is larger than the sum of its proper divisors (85975315).

3721972759313 is an equidigital number, since it uses as much as digits as its factorization.

3721972759313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85975314.

The product of its digits is 15002820, while the sum is 59.

The spelling of 3721972759313 in words is "three trillion, seven hundred twenty-one billion, nine hundred seventy-two million, seven hundred fifty-nine thousand, three hundred thirteen".