1090897 has 2 divisors, whose sum is σ = 1090898. Its totient is φ = 1090896.

The previous prime is 1090891. The next prime is 1090909. The reversal of 1090897 is 7980901.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1089936 + 961 = 1044^2 + 31^2 .

It is a cyclic number.

It is not a de Polignac number, because 1090897 - 2³ = 1090889 is a prime.

1090897 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (1090891) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 545448 + 545449.

It is an arithmetic number, because the mean of its divisors is an integer number (545449).

2^1090897 is an apocalyptic number.

It is an amenable number.

1090897 is a deficient number, since it is larger than the sum of its proper divisors (1).

1090897 is an equidigital number, since it uses as much as digits as its factorization.

1090897 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4536, while the sum is 34.

The square root of 1090897 is about 1044.4601476361. The cubic root of 1090897 is about 102.9424695220.

The spelling of 1090897 in words is "one million, ninety thousand, eight hundred ninety-seven".