1090918291 has 4 divisors (see below), whose sum is σ = 1093105000. Its totient is φ = 1088731584.

The previous prime is 1090918289. The next prime is 1090918331. The reversal of 1090918291 is 1928190901.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1090918291 - 2¹ = 1090918289 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1090918261) 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, 1092606 + ... + 1093603.

It is an arithmetic number, because the mean of its divisors is an integer number (273276250).

Almost surely, 2^1090918291 is an apocalyptic number.

1090918291 is a deficient number, since it is larger than the sum of its proper divisors (2186709).

1090918291 is an equidigital number, since it uses as much as digits as its factorization.

1090918291 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2186708.

The product of its (nonzero) digits is 11664, while the sum is 40.

The square root of 1090918291 is about 33029.0522267897. The cubic root of 1090918291 is about 1029.4313922585.

The spelling of 1090918291 in words is "one billion, ninety million, nine hundred eighteen thousand, two hundred ninety-one".