723857680712381 has 4 divisors (see below), whose sum is σ = 725718497372700. Its totient is φ = 721996864052064.

The previous prime is 723857680712293. The next prime is 723857680712437. The reversal of 723857680712381 is 183217086758327.

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 241591221672025 + 482266459040356 = 15543205^2 + 21960566^2 .

It is a cyclic number.

It is not a de Polignac number, because 723857680712381 - 2¹⁸ = 723857680450237 is a prime.

It is a super-3 number, since 3×723857680712381³ (a number of 46 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (723857680712581) 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, 930408329576 + ... + 930408330353.

It is an arithmetic number, because the mean of its divisors is an integer number (181429624343175).

Almost surely, 2^{723857680712381} is an apocalyptic number.

It is an amenable number.

723857680712381 is a deficient number, since it is larger than the sum of its proper divisors (1860816660319).

723857680712381 is a wasteful number, since it uses less digits than its factorization.

723857680712381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1860816660318.

The product of its (nonzero) digits is 189665280, while the sum is 68.

The spelling of 723857680712381 in words is "seven hundred twenty-three trillion, eight hundred fifty-seven billion, six hundred eighty million, seven hundred twelve thousand, three hundred eighty-one".