1397497 has 2 divisors, whose sum is σ = 1397498. Its totient is φ = 1397496.

The previous prime is 1397491. The next prime is 1397509. The reversal of 1397497 is 7947931.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1279161 + 118336 = 1131^2 + 344^2 .

It is an emirp because it is prime and its reverse (7947931) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1397497 - 2¹⁹ = 873209 is a prime.

It is a Chen prime.

It is an Ulam number.

It is not a weakly prime, because it can be changed into another prime (1397491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 698748 + 698749.

It is an arithmetic number, because the mean of its divisors is an integer number (698749).

2^1397497 is an apocalyptic number.

It is an amenable number.

1397497 is a deficient number, since it is larger than the sum of its proper divisors (1).

1397497 is an equidigital number, since it uses as much as digits as its factorization.

1397497 is an evil number, because the sum of its binary digits is even.

The product of its digits is 47628, while the sum is 40.

The square root of 1397497 is about 1182.1577728882. The cubic root of 1397497 is about 111.8021859035.

The spelling of 1397497 in words is "one million, three hundred ninety-seven thousand, four hundred ninety-seven".