1090990871 has 2 divisors, whose sum is σ = 1090990872. Its totient is φ = 1090990870.

The previous prime is 1090990847. The next prime is 1090990897. The reversal of 1090990871 is 1780990901.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1090990871 is a prime.

It is a super-2 number, since 2×1090990871² = 2380522161210677282, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1090990841) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 545495435 + 545495436.

It is an arithmetic number, because the mean of its divisors is an integer number (545495436).

Almost surely, 2^1090990871 is an apocalyptic number.

1090990871 is a deficient number, since it is larger than the sum of its proper divisors (1).

1090990871 is an equidigital number, since it uses as much as digits as its factorization.

1090990871 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 40824, while the sum is 44.

The square root of 1090990871 is about 33030.1509381958. The cubic root of 1090990871 is about 1029.4542214885.

The spelling of 1090990871 in words is "one billion, ninety million, nine hundred ninety thousand, eight hundred seventy-one".