1091126623 has 16 divisors (see below), whose sum is σ = 1255357440. Its totient is φ = 941500800.

The previous prime is 1091126587. The next prime is 1091126627. The reversal of 1091126623 is 3266211901.

It is not a de Polignac number, because 1091126623 - 2¹⁷ = 1090995551 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1091126627) 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, 44473 + ... + 64498.

It is an arithmetic number, because the mean of its divisors is an integer number (78459840).

Almost surely, 2^1091126623 is an apocalyptic number.

1091126623 is a deficient number, since it is larger than the sum of its proper divisors (164230817).

1091126623 is a wasteful number, since it uses less digits than its factorization.

1091126623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109038.

The product of its (nonzero) digits is 3888, while the sum is 31.

The square root of 1091126623 is about 33032.2058452051. The cubic root of 1091126623 is about 1029.4969180491.

The spelling of 1091126623 in words is "one billion, ninety-one million, one hundred twenty-six thousand, six hundred twenty-three".