1091386939 has 8 divisors (see below), whose sum is σ = 1095344640. Its totient is φ = 1087437096.

The previous prime is 1091386921. The next prime is 1091386949. The reversal of 1091386939 is 9396831901.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1091386939 - 2⁷ = 1091386811 is a prime.

It is a super-2 number, since 2×1091386939² = 2382250901239579442, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1091386892 and 1091386901.

It is not an unprimeable number, because it can be changed into a prime (1091386949) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 427902 + ... + 430444.

It is an arithmetic number, because the mean of its divisors is an integer number (136918080).

Almost surely, 2^1091386939 is an apocalyptic number.

1091386939 is a deficient number, since it is larger than the sum of its proper divisors (3957701).

1091386939 is an equidigital number, since it uses as much as digits as its factorization.

1091386939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3929.

The product of its (nonzero) digits is 314928, while the sum is 49.

The square root of 1091386939 is about 33036.1459465235. The cubic root of 1091386939 is about 1029.5787824281.

The spelling of 1091386939 in words is "one billion, ninety-one million, three hundred eighty-six thousand, nine hundred thirty-nine".