1091380139 has 2 divisors, whose sum is σ = 1091380140. Its totient is φ = 1091380138.

The previous prime is 1091380117. The next prime is 1091380177. The reversal of 1091380139 is 9310831901.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1091380139 - 2¹² = 1091376043 is a prime.

It is a super-2 number, since 2×1091380139² = 2382221215607318642, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1091380099 and 1091380108.

It is not a weakly prime, because it can be changed into another prime (1091380109) 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 as a sum of consecutive naturals, namely, 545690069 + 545690070.

It is an arithmetic number, because the mean of its divisors is an integer number (545690070).

Almost surely, 2^1091380139 is an apocalyptic number.

1091380139 is a deficient number, since it is larger than the sum of its proper divisors (1).

1091380139 is an equidigital number, since it uses as much as digits as its factorization.

1091380139 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 35.

The square root of 1091380139 is about 33036.0430287890. The cubic root of 1091380139 is about 1029.5766441243.

The spelling of 1091380139 in words is "one billion, ninety-one million, three hundred eighty thousand, one hundred thirty-nine".