31723434743 has 64 divisors (see below), whose sum is σ = 43528181760. Its totient is φ = 22322995200.

The previous prime is 31723434719. The next prime is 31723434761. The reversal of 31723434743 is 34743432713.

It is not a de Polignac number, because 31723434743 - 2¹⁰ = 31723433719 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 31723434743.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31723434703) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 8639798 + ... + 8643468.

It is an arithmetic number, because the mean of its divisors is an integer number (680127840).

Almost surely, 2^31723434743 is an apocalyptic number.

31723434743 is a deficient number, since it is larger than the sum of its proper divisors (11804747017).

31723434743 is a wasteful number, since it uses less digits than its factorization.

31723434743 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3888.

The product of its digits is 508032, while the sum is 41.

The spelling of 31723434743 in words is "thirty-one billion, seven hundred twenty-three million, four hundred thirty-four thousand, seven hundred forty-three".