1091794749 has 16 divisors (see below), whose sum is σ = 1474381440. Its totient is φ = 718577600.

The previous prime is 1091794733. The next prime is 1091794763. The reversal of 1091794749 is 9474971901.

It is a cyclic number.

It is not a de Polignac number, because 1091794749 - 2⁴ = 1091794733 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1091794729) 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, 103759 + ... + 113795.

It is an arithmetic number, because the mean of its divisors is an integer number (92148840).

Almost surely, 2^1091794749 is an apocalyptic number.

It is an amenable number.

1091794749 is a deficient number, since it is larger than the sum of its proper divisors (382586691).

1091794749 is a wasteful number, since it uses less digits than its factorization.

1091794749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10500.

The product of its (nonzero) digits is 571536, while the sum is 51.

The square root of 1091794749 is about 33042.3175488645. The cubic root of 1091794749 is about 1029.7070046691.

The spelling of 1091794749 in words is "one billion, ninety-one million, seven hundred ninety-four thousand, seven hundred forty-nine".