1091443974 has 16 divisors (see below), whose sum is σ = 2233653312. Its totient is φ = 355353768.

The previous prime is 1091443963. The next prime is 1091443981. The reversal of 1091443974 is 4793441901.

1091443974 is nontrivially palindromic in base 11.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2114944 + ... + 2115459.

It is an arithmetic number, because the mean of its divisors is an integer number (139603332).

Almost surely, 2^1091443974 is an apocalyptic number.

1091443974 is an abundant number, since it is smaller than the sum of its proper divisors (1142209338).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1091443974 is a wasteful number, since it uses less digits than its factorization.

1091443974 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4230451.

The product of its (nonzero) digits is 108864, while the sum is 42.

The square root of 1091443974 is about 33037.0091563991. The cubic root of 1091443974 is about 1029.5967171009.

The spelling of 1091443974 in words is "one billion, ninety-one million, four hundred forty-three thousand, nine hundred seventy-four".