1090431239 has 2 divisors, whose sum is σ = 1090431240. Its totient is φ = 1090431238.

The previous prime is 1090431217. The next prime is 1090431241. The reversal of 1090431239 is 9321340901.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1090431239 is a prime.

It is a Sophie Germain prime.

Together with 1090431241, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1090431259) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 545215619 + 545215620.

It is an arithmetic number, because the mean of its divisors is an integer number (545215620).

Almost surely, 2^1090431239 is an apocalyptic number.

1090431239 is a deficient number, since it is larger than the sum of its proper divisors (1).

1090431239 is an equidigital number, since it uses as much as digits as its factorization.

1090431239 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5832, while the sum is 32.

The square root of 1090431239 is about 33021.6783189468. The cubic root of 1090431239 is about 1029.2781692788.

The spelling of 1090431239 in words is "one billion, ninety million, four hundred thirty-one thousand, two hundred thirty-nine".