1091440907 has 2 divisors, whose sum is σ = 1091440908. Its totient is φ = 1091440906.

The previous prime is 1091440891. The next prime is 1091440913. The reversal of 1091440907 is 7090441901.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1091440907 - 2⁴ = 1091440891 is a prime.

It is a super-6 number, since 6×1091440907⁶ (a number of 56 digits) contains 666666 as substring.

It is not a weakly prime, because it can be changed into another prime (1091440937) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 545720453 + 545720454.

It is an arithmetic number, because the mean of its divisors is an integer number (545720454).

Almost surely, 2^1091440907 is an apocalyptic number.

1091440907 is a deficient number, since it is larger than the sum of its proper divisors (1).

1091440907 is an equidigital number, since it uses as much as digits as its factorization.

1091440907 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9072, while the sum is 35.

The square root of 1091440907 is about 33036.9627387265. The cubic root of 1091440907 is about 1029.5957526977.

The spelling of 1091440907 in words is "one billion, ninety-one million, four hundred forty thousand, nine hundred seven".