3091397 has 2 divisors, whose sum is σ = 3091398. Its totient is φ = 3091396.

The previous prime is 3091393. The next prime is 3091409. The reversal of 3091397 is 7931903.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1653796 + 1437601 = 1286^2 + 1199^2 .

It is a cyclic number.

It is not a de Polignac number, because 3091397 - 2² = 3091393 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3091391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1545698 + 1545699.

It is an arithmetic number, because the mean of its divisors is an integer number (1545699).

Almost surely, 2^3091397 is an apocalyptic number.

It is an amenable number.

3091397 is a deficient number, since it is larger than the sum of its proper divisors (1).

3091397 is an equidigital number, since it uses as much as digits as its factorization.

3091397 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5103, while the sum is 32.

The square root of 3091397 is about 1758.2369009892. The cubic root of 3091397 is about 145.6749665520.

The spelling of 3091397 in words is "three million, ninety-one thousand, three hundred ninety-seven".