8391349 has 2 divisors, whose sum is σ = 8391350. Its totient is φ = 8391348.

The previous prime is 8391337. The next prime is 8391377. The reversal of 8391349 is 9431938.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8236900 + 154449 = 2870^2 + 393^2 .

It is a cyclic number.

It is not a de Polignac number, because 8391349 - 2¹¹ = 8389301 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8391949) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4195674 + 4195675.

It is an arithmetic number, because the mean of its divisors is an integer number (4195675).

Almost surely, 2^8391349 is an apocalyptic number.

It is an amenable number.

8391349 is a deficient number, since it is larger than the sum of its proper divisors (1).

8391349 is an equidigital number, since it uses as much as digits as its factorization.

8391349 is an evil number, because the sum of its binary digits is even.

The product of its digits is 23328, while the sum is 37.

The square root of 8391349 is about 2896.7825254927. The cubic root of 8391349 is about 203.2094629095.

The spelling of 8391349 in words is "eight million, three hundred ninety-one thousand, three hundred forty-nine".