1089091 has 2 divisors, whose sum is σ = 1089092. Its totient is φ = 1089090.

The previous prime is 1089047. The next prime is 1089103. The reversal of 1089091 is 1909801.

It is a strong prime.

It is an emirp because it is prime and its reverse (1909801) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1089091 - 2⁹ = 1088579 is a prime.

It is a super-2 number, since 2×1089091² = 2372238412562, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1089191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 544545 + 544546.

It is an arithmetic number, because the mean of its divisors is an integer number (544546).

2^1089091 is an apocalyptic number.

1089091 is a deficient number, since it is larger than the sum of its proper divisors (1).

1089091 is an equidigital number, since it uses as much as digits as its factorization.

1089091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 648, while the sum is 28.

The square root of 1089091 is about 1043.5952280458. The cubic root of 1089091 is about 102.8856304287.

The spelling of 1089091 in words is "one million, eighty-nine thousand, ninety-one".