691343 has 2 divisors, whose sum is σ = 691344. Its totient is φ = 691342.

The previous prime is 691337. The next prime is 691349. The reversal of 691343 is 343196.

691343 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a balanced prime because it is at equal distance from previous prime (691337) and next prime (691349).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-691343 is a prime.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 691343.

It is not a weakly prime, because it can be changed into another prime (691349) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 345671 + 345672.

It is an arithmetic number, because the mean of its divisors is an integer number (345672).

2⁶⁹¹³⁴³ is an apocalyptic number.

691343 is a deficient number, since it is larger than the sum of its proper divisors (1).

691343 is an equidigital number, since it uses as much as digits as its factorization.

691343 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1944, while the sum is 26.

The square root of 691343 is about 831.4703843192. The cubic root of 691343 is about 88.4228529602.

The spelling of 691343 in words is "six hundred ninety-one thousand, three hundred forty-three".