1713731561 has 4 divisors (see below), whose sum is σ = 1739309712. Its totient is φ = 1688153412.

The previous prime is 1713731557. The next prime is 1713731603. The reversal of 1713731561 is 1651373171.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1651373171 = 7 ⋅235910453.

It is a cyclic number.

It is not a de Polignac number, because 1713731561 - 2² = 1713731557 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1713733561) 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, 12788975 + ... + 12789108.

It is an arithmetic number, because the mean of its divisors is an integer number (434827428).

Almost surely, 2^1713731561 is an apocalyptic number.

It is an amenable number.

1713731561 is a deficient number, since it is larger than the sum of its proper divisors (25578151).

1713731561 is an equidigital number, since it uses as much as digits as its factorization.

1713731561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25578150.

The product of its digits is 13230, while the sum is 35.

The square root of 1713731561 is about 41397.2409829447. The cubic root of 1713731561 is about 1196.6879878246.

The spelling of 1713731561 in words is "one billion, seven hundred thirteen million, seven hundred thirty-one thousand, five hundred sixty-one".