1000397 has 2 divisors, whose sum is σ = 1000398. Its totient is φ = 1000396.

The previous prime is 1000393. The next prime is 1000403. The reversal of 1000397 is 7930001.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 546121 + 454276 = 739^2 + 674^2 .

It is a cyclic number.

It is not a de Polignac number, because 1000397 - 2² = 1000393 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1000393) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 500198 + 500199.

It is an arithmetic number, because the mean of its divisors is an integer number (500199).

2^1000397 is an apocalyptic number.

It is an amenable number.

1000397 is a deficient number, since it is larger than the sum of its proper divisors (1).

1000397 is an equidigital number, since it uses as much as digits as its factorization.

1000397 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 189, while the sum is 20.

The square root of 1000397 is about 1000.1984803028. The cubic root of 1000397 is about 100.0132315825.

Adding to 1000397 its reverse (7930001), we get a palindrome (8930398).

The spelling of 1000397 in words is "one million, three hundred ninety-seven", and thus it is an aban number.