1090139779 has 2 divisors, whose sum is σ = 1090139780. Its totient is φ = 1090139778.

The previous prime is 1090139777. The next prime is 1090139833. The reversal of 1090139779 is 9779310901.

It is a weak prime.

It is an emirp because it is prime and its reverse (9779310901) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1090139779 - 2¹ = 1090139777 is a prime.

Together with 1090139777, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1090139777) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 545069889 + 545069890.

It is an arithmetic number, because the mean of its divisors is an integer number (545069890).

Almost surely, 2^1090139779 is an apocalyptic number.

1090139779 is a deficient number, since it is larger than the sum of its proper divisors (1).

1090139779 is an equidigital number, since it uses as much as digits as its factorization.

1090139779 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 107163, while the sum is 46.

The square root of 1090139779 is about 33017.2648624928. The cubic root of 1090139779 is about 1029.1864562829.

The spelling of 1090139779 in words is "one billion, ninety million, one hundred thirty-nine thousand, seven hundred seventy-nine".