716731 has 2 divisors, whose sum is σ = 716732. Its totient is φ = 716730.

The previous prime is 716713. The next prime is 716741. The reversal of 716731 is 137617.

Together with previous prime (716713) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-716731 is a prime.

It is a super-2 number, since 2×716731² = 1027406652722, which contains 22 as substring.

716731 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 716696 and 716705.

It is not a weakly prime, because it can be changed into another prime (716741) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 358365 + 358366.

It is an arithmetic number, because the mean of its divisors is an integer number (358366).

2⁷¹⁶⁷³¹ is an apocalyptic number.

716731 is a deficient number, since it is larger than the sum of its proper divisors (1).

716731 is an equidigital number, since it uses as much as digits as its factorization.

716731 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 882, while the sum is 25.

The square root of 716731 is about 846.5996692652. The cubic root of 716731 is about 89.4922436398.

The spelling of 716731 in words is "seven hundred sixteen thousand, seven hundred thirty-one".