716743681 has 4 divisors (see below), whose sum is σ = 758905092. Its totient is φ = 674582272.

The previous prime is 716743667. The next prime is 716743691. The reversal of 716743681 is 186347617.

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 354983281 + 361760400 = 18841^2 + 19020^2 .

It is a cyclic number.

It is not a de Polignac number, because 716743681 - 2¹⁹ = 716219393 is a prime.

It is a super-2 number, since 2×716743681² = 1027443008506859522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (716743691) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21080680 + ... + 21080713.

It is an arithmetic number, because the mean of its divisors is an integer number (189726273).

Almost surely, 2^716743681 is an apocalyptic number.

It is an amenable number.

716743681 is a deficient number, since it is larger than the sum of its proper divisors (42161411).

716743681 is a wasteful number, since it uses less digits than its factorization.

716743681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42161410.

The product of its digits is 169344, while the sum is 43.

The square root of 716743681 is about 26772.0690459292. The cubic root of 716743681 is about 894.9277142705.

The spelling of 716743681 in words is "seven hundred sixteen million, seven hundred forty-three thousand, six hundred eighty-one".