816743 has 2 divisors, whose sum is σ = 816744. Its totient is φ = 816742.

The previous prime is 816709. The next prime is 816763. The reversal of 816743 is 347618.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 816743 - 2¹⁶ = 751207 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a plaindrome in base 12.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (816703) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 408371 + 408372.

It is an arithmetic number, because the mean of its divisors is an integer number (408372).

2⁸¹⁶⁷⁴³ is an apocalyptic number.

816743 is a deficient number, since it is larger than the sum of its proper divisors (1).

816743 is an equidigital number, since it uses as much as digits as its factorization.

816743 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4032, while the sum is 29.

The square root of 816743 is about 903.7383470895. The cubic root of 816743 is about 93.4749282200.

The spelling of 816743 in words is "eight hundred sixteen thousand, seven hundred forty-three".