1397437 has 2 divisors, whose sum is σ = 1397438. Its totient is φ = 1397436.

The previous prime is 1397359. The next prime is 1397441. The reversal of 1397437 is 7347931.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1390041 + 7396 = 1179^2 + 86^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1397437 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1397447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 698718 + 698719.

It is an arithmetic number, because the mean of its divisors is an integer number (698719).

2^1397437 is an apocalyptic number.

It is an amenable number.

1397437 is a deficient number, since it is larger than the sum of its proper divisors (1).

1397437 is an equidigital number, since it uses as much as digits as its factorization.

1397437 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15876, while the sum is 34.

The square root of 1397437 is about 1182.1323952925. The cubic root of 1397437 is about 111.8005858459.

The spelling of 1397437 in words is "one million, three hundred ninety-seven thousand, four hundred thirty-seven".