1090919293 has 4 divisors (see below), whose sum is σ = 1090986208. Its totient is φ = 1090852380.

The previous prime is 1090919273. The next prime is 1090919309. The reversal of 1090919293 is 3929190901.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 3929190901 = 23 ⋅170834387.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1090919293 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1090919273) 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, 8728 + ... + 47518.

It is an arithmetic number, because the mean of its divisors is an integer number (272746552).

Almost surely, 2^1090919293 is an apocalyptic number.

It is an amenable number.

1090919293 is a deficient number, since it is larger than the sum of its proper divisors (66915).

1090919293 is an equidigital number, since it uses as much as digits as its factorization.

1090919293 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66914.

The product of its (nonzero) digits is 39366, while the sum is 43.

The square root of 1090919293 is about 33029.0673952505. The cubic root of 1090919293 is about 1029.4317074334.

The spelling of 1090919293 in words is "one billion, ninety million, nine hundred nineteen thousand, two hundred ninety-three".