1090531681 has 8 divisors (see below), whose sum is σ = 1093984128. Its totient is φ = 1087086000.

The previous prime is 1090531679. The next prime is 1090531723. The reversal of 1090531681 is 1861350901.

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 1090531681 - 2¹ = 1090531679 is a prime.

It is a super-2 number, since 2×1090531681² = 2378518694529371522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1090531621) 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, 601266 + ... + 603076.

It is an arithmetic number, because the mean of its divisors is an integer number (136748016).

Almost surely, 2^1090531681 is an apocalyptic number.

It is an amenable number.

1090531681 is a deficient number, since it is larger than the sum of its proper divisors (3452447).

1090531681 is an equidigital number, since it uses as much as digits as its factorization.

1090531681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3383.

The product of its (nonzero) digits is 6480, while the sum is 34.

The square root of 1090531681 is about 33023.1991333366. The cubic root of 1090531681 is about 1029.3097713277.

The spelling of 1090531681 in words is "one billion, ninety million, five hundred thirty-one thousand, six hundred eighty-one".