1397447 has 2 divisors, whose sum is σ = 1397448. Its totient is φ = 1397446.

The previous prime is 1397443. The next prime is 1397477. The reversal of 1397447 is 7447931.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1397447 - 2² = 1397443 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1397441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 698723 + 698724.

It is an arithmetic number, because the mean of its divisors is an integer number (698724).

2^1397447 is an apocalyptic number.

1397447 is a deficient number, since it is larger than the sum of its proper divisors (1).

1397447 is an equidigital number, since it uses as much as digits as its factorization.

1397447 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 21168, while the sum is 35.

The square root of 1397447 is about 1182.1366249296. The cubic root of 1397447 is about 111.8008525253.

The spelling of 1397447 in words is "one million, three hundred ninety-seven thousand, four hundred forty-seven".