691349 has 2 divisors, whose sum is σ = 691350. Its totient is φ = 691348.

The previous prime is 691343. The next prime is 691363. The reversal of 691349 is 943196.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 628849 + 62500 = 793^2 + 250^2 .

It is a cyclic number.

It is not a de Polignac number, because 691349 - 2⁴ = 691333 is a prime.

It is a Chen 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 691349.

It is not a weakly prime, because it can be changed into another prime (691343) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 345674 + 345675.

It is an arithmetic number, because the mean of its divisors is an integer number (345675).

2⁶⁹¹³⁴⁹ is an apocalyptic number.

It is an amenable number.

691349 is a deficient number, since it is larger than the sum of its proper divisors (1).

691349 is an equidigital number, since it uses as much as digits as its factorization.

691349 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5832, while the sum is 32.

The square root of 691349 is about 831.4739923774. The cubic root of 691349 is about 88.4231087597.

The spelling of 691349 in words is "six hundred ninety-one thousand, three hundred forty-nine".