1090705871 has 4 divisors (see below), whose sum is σ = 1090929312. Its totient is φ = 1090482432.

The previous prime is 1090705867. The next prime is 1090705883. The reversal of 1090705871 is 1785070901.

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 1090705871 - 2² = 1090705867 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 (1090705571) 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, 104231 + ... + 114216.

It is an arithmetic number, because the mean of its divisors is an integer number (272732328).

Almost surely, 2^1090705871 is an apocalyptic number.

1090705871 is a deficient number, since it is larger than the sum of its proper divisors (223441).

1090705871 is an equidigital number, since it uses as much as digits as its factorization.

1090705871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 223440.

The product of its (nonzero) digits is 17640, while the sum is 38.

The square root of 1090705871 is about 33025.8364163574. The cubic root of 1090705871 is about 1029.3645720965.

The spelling of 1090705871 in words is "one billion, ninety million, seven hundred five thousand, eight hundred seventy-one".