1091109937 has 2 divisors, whose sum is σ = 1091109938. Its totient is φ = 1091109936.

The previous prime is 1091109931. The next prime is 1091109973. The reversal of 1091109937 is 7399011901.

Together with next prime (1091109973) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 945931536 + 145178401 = 30756^2 + 12049^2 .

It is a cyclic number.

It is not a de Polignac number, because 1091109937 - 2⁷ = 1091109809 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1091109937.

It is not a weakly prime, because it can be changed into another prime (1091109931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 545554968 + 545554969.

It is an arithmetic number, because the mean of its divisors is an integer number (545554969).

Almost surely, 2^1091109937 is an apocalyptic number.

It is an amenable number.

1091109937 is a deficient number, since it is larger than the sum of its proper divisors (1).

1091109937 is an equidigital number, since it uses as much as digits as its factorization.

1091109937 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15309, while the sum is 40.

The square root of 1091109937 is about 33031.9532725511. The cubic root of 1091109937 is about 1029.4916701787.

The spelling of 1091109937 in words is "one billion, ninety-one million, one hundred nine thousand, nine hundred thirty-seven".