1089397 has 2 divisors, whose sum is σ = 1089398. Its totient is φ = 1089396.

The previous prime is 1089383. The next prime is 1089401. The reversal of 1089397 is 7939801.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 894916 + 194481 = 946^2 + 441^2 .

It is a cyclic number.

It is not a de Polignac number, because 1089397 - 2¹¹ = 1087349 is a prime.

1089397 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1089197) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 544698 + 544699.

It is an arithmetic number, because the mean of its divisors is an integer number (544699).

2^1089397 is an apocalyptic number.

It is an amenable number.

1089397 is a deficient number, since it is larger than the sum of its proper divisors (1).

1089397 is an equidigital number, since it uses as much as digits as its factorization.

1089397 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13608, while the sum is 37.

The square root of 1089397 is about 1043.7418263153. The cubic root of 1089397 is about 102.8952653918.

The spelling of 1089397 in words is "one million, eighty-nine thousand, three hundred ninety-seven".