1091930093 has 4 divisors (see below), whose sum is σ = 1092317820. Its totient is φ = 1091542368.

The previous prime is 1091930071. The next prime is 1091930101. The reversal of 1091930093 is 3900391901.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3900391901 = 7 ⋅557198843.

It can be written as a sum of positive squares in 2 ways, for example, as 192709924 + 899220169 = 13882^2 + 29987^2 .

It is a cyclic number.

It is not a de Polignac number, because 1091930093 - 2⁶ = 1091930029 is a prime.

It is a super-2 number, since 2×1091930093² = 2384622655997977298, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1091930293) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 189608 + ... + 195281.

It is an arithmetic number, because the mean of its divisors is an integer number (273079455).

Almost surely, 2^1091930093 is an apocalyptic number.

It is an amenable number.

1091930093 is a deficient number, since it is larger than the sum of its proper divisors (387727).

1091930093 is an equidigital number, since it uses as much as digits as its factorization.

1091930093 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 387726.

The product of its (nonzero) digits is 6561, while the sum is 35.

The square root of 1091930093 is about 33044.3655257595. The cubic root of 1091930093 is about 1029.7495520149.

The spelling of 1091930093 in words is "one billion, ninety-one million, nine hundred thirty thousand, ninety-three".