1091028119 has 6 divisors (see below), whose sum is σ = 1095120936. Its totient is φ = 1086939360.

The previous prime is 1091028083. The next prime is 1091028173. The reversal of 1091028119 is 9118201901.

It is a de Polignac number, because none of the positive numbers 2^k-1091028119 is a prime.

It is a super-2 number, since 2×1091028119² = 2380684712897356322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1091028319) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 581567 + ... + 583439.

It is an arithmetic number, because the mean of its divisors is an integer number (182520156).

Almost surely, 2^1091028119 is an apocalyptic number.

1091028119 is a deficient number, since it is larger than the sum of its proper divisors (4092817).

1091028119 is an frugal number, since it uses more digits than its factorization.

1091028119 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4057 (or 2184 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 32.

The square root of 1091028119 is about 33030.7147818511. The cubic root of 1091028119 is about 1029.4659370385.

The spelling of 1091028119 in words is "one billion, ninety-one million, twenty-eight thousand, one hundred nineteen".