1011397 has 2 divisors, whose sum is σ = 1011398. Its totient is φ = 1011396.

The previous prime is 1011391. The next prime is 1011407. The reversal of 1011397 is 7931101.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 829921 + 181476 = 911^2 + 426^2 .

It is an emirp because it is prime and its reverse (7931101) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1011397 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1011391) 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, 505698 + 505699.

It is an arithmetic number, because the mean of its divisors is an integer number (505699).

2^1011397 is an apocalyptic number.

It is an amenable number.

1011397 is a deficient number, since it is larger than the sum of its proper divisors (1).

1011397 is an equidigital number, since it uses as much as digits as its factorization.

1011397 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 189, while the sum is 22.

The square root of 1011397 is about 1005.6823554184. The cubic root of 1011397 is about 100.3784658292.

Adding to 1011397 its reverse (7931101), we get a palindrome (8942498).

The spelling of 1011397 in words is "one million, eleven thousand, three hundred ninety-seven".