1724139013 has 4 divisors (see below), whose sum is σ = 1741913740. Its totient is φ = 1706364288.

The previous prime is 1724138993. The next prime is 1724139049. The reversal of 1724139013 is 3109314271.

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 1070467524 + 653671489 = 32718^2 + 25567^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1724139013 is a prime.

It is a super-2 number, since 2×1724139013² = 5945310672297228338, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1724139113) 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, 8887218 + ... + 8887411.

It is an arithmetic number, because the mean of its divisors is an integer number (435478435).

Almost surely, 2^1724139013 is an apocalyptic number.

It is an amenable number.

1724139013 is a deficient number, since it is larger than the sum of its proper divisors (17774727).

1724139013 is an equidigital number, since it uses as much as digits as its factorization.

1724139013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17774726.

The product of its (nonzero) digits is 4536, while the sum is 31.

The square root of 1724139013 is about 41522.7529554580. The cubic root of 1724139013 is about 1199.1055865287.

The spelling of 1724139013 in words is "one billion, seven hundred twenty-four million, one hundred thirty-nine thousand, thirteen".