1091383591 has 2 divisors, whose sum is σ = 1091383592. Its totient is φ = 1091383590.

The previous prime is 1091383549. The next prime is 1091383597. The reversal of 1091383591 is 1953831901.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1091383591 - 2⁷ = 1091383463 is a prime.

It is a super-2 number, since 2×1091383591² = 2382236285408110562, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1091383597) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 545691795 + 545691796.

It is an arithmetic number, because the mean of its divisors is an integer number (545691796).

Almost surely, 2^1091383591 is an apocalyptic number.

1091383591 is a deficient number, since it is larger than the sum of its proper divisors (1).

1091383591 is an equidigital number, since it uses as much as digits as its factorization.

1091383591 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 29160, while the sum is 40.

The square root of 1091383591 is about 33036.0952747143. The cubic root of 1091383591 is about 1029.5777296291.

The spelling of 1091383591 in words is "one billion, ninety-one million, three hundred eighty-three thousand, five hundred ninety-one".