1090997 has 2 divisors, whose sum is σ = 1090998. Its totient is φ = 1090996.

The previous prime is 1090979. The next prime is 1091003. The reversal of 1090997 is 7990901.

It is a happy number.

Together with previous prime (1090979) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1012036 + 78961 = 1006^2 + 281^2 .

It is a cyclic number.

It is not a de Polignac number, because 1090997 - 2¹² = 1086901 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1090927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 545498 + 545499.

It is an arithmetic number, because the mean of its divisors is an integer number (545499).

2^1090997 is an apocalyptic number.

It is an amenable number.

1090997 is a deficient number, since it is larger than the sum of its proper divisors (1).

1090997 is an equidigital number, since it uses as much as digits as its factorization.

1090997 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5103, while the sum is 35.

The square root of 1090997 is about 1044.5080181597. The cubic root of 1090997 is about 102.9456149251.

The spelling of 1090997 in words is "one million, ninety thousand, nine hundred ninety-seven".