1091662023 has 16 divisors (see below), whose sum is σ = 1531355616. Its totient is φ = 690831360.

The previous prime is 1091662009. The next prime is 1091662049. The reversal of 1091662023 is 3202661901.

It is not a de Polignac number, because 1091662023 - 2¹² = 1091657927 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1091669023) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 115386 + ... + 124487.

It is an arithmetic number, because the mean of its divisors is an integer number (95709726).

Almost surely, 2^1091662023 is an apocalyptic number.

1091662023 is a deficient number, since it is larger than the sum of its proper divisors (439693593).

1091662023 is a wasteful number, since it uses less digits than its factorization.

1091662023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 239954.

The product of its (nonzero) digits is 3888, while the sum is 30.

The square root of 1091662023 is about 33040.3090633245. The cubic root of 1091662023 is about 1029.6652769144.

The spelling of 1091662023 in words is "one billion, ninety-one million, six hundred sixty-two thousand, twenty-three".