1090509331 has 4 divisors (see below), whose sum is σ = 1108992600. Its totient is φ = 1072026064.

The previous prime is 1090509271. The next prime is 1090509391. The reversal of 1090509331 is 1339050901.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (1090509271) and next prime (1090509391).

It is a cyclic number.

It is not a de Polignac number, because 1090509331 - 2¹⁷ = 1090378259 is a prime.

It is a super-2 number, since 2×1090509331² = 2378421201996135122, 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 = 1090509293 and 1090509302.

It is not an unprimeable number, because it can be changed into a prime (1090509391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9241546 + ... + 9241663.

It is an arithmetic number, because the mean of its divisors is an integer number (277248150).

Almost surely, 2^1090509331 is an apocalyptic number.

1090509331 is a deficient number, since it is larger than the sum of its proper divisors (18483269).

1090509331 is an equidigital number, since it uses as much as digits as its factorization.

1090509331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18483268.

The product of its (nonzero) digits is 3645, while the sum is 31.

The square root of 1090509331 is about 33022.8607331346. The cubic root of 1090509331 is about 1029.3027395189.

The spelling of 1090509331 in words is "one billion, ninety million, five hundred nine thousand, three hundred thirty-one".