1089239 has 2 divisors, whose sum is σ = 1089240. Its totient is φ = 1089238.

The previous prime is 1089227. The next prime is 1089259. The reversal of 1089239 is 9329801.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1089239 - 2⁴ = 1089223 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1089259) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 544619 + 544620.

It is an arithmetic number, because the mean of its divisors is an integer number (544620).

2^1089239 is an apocalyptic number.

1089239 is a deficient number, since it is larger than the sum of its proper divisors (1).

1089239 is an equidigital number, since it uses as much as digits as its factorization.

1089239 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3888, while the sum is 32.

The square root of 1089239 is about 1043.6661343552. Note that the first 3 decimals coincide. The cubic root of 1089239 is about 102.8902907015.

The spelling of 1089239 in words is "one million, eighty-nine thousand, two hundred thirty-nine".