1090562991 has 16 divisors (see below), whose sum is σ = 1669269504. Its totient is φ = 620381664.

The previous prime is 1090562989. The next prime is 1090562999. The reversal of 1090562991 is 1992650901.

It is a happy number.

It is not a de Polignac number, because 1090562991 - 2¹ = 1090562989 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1090562999) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 111756 + ... + 121121.

It is an arithmetic number, because the mean of its divisors is an integer number (104329344).

Almost surely, 2^1090562991 is an apocalyptic number.

1090562991 is a deficient number, since it is larger than the sum of its proper divisors (578706513).

1090562991 is a wasteful number, since it uses less digits than its factorization.

1090562991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 233110.

The product of its (nonzero) digits is 43740, while the sum is 42.

The square root of 1090562991 is about 33023.6731906068. The cubic root of 1090562991 is about 1029.3196219908.

The spelling of 1090562991 in words is "one billion, ninety million, five hundred sixty-two thousand, nine hundred ninety-one".