1055109989 has 2 divisors, whose sum is σ = 1055109990. Its totient is φ = 1055109988.

The previous prime is 1055109983. The next prime is 1055110057. The reversal of 1055109989 is 9899015501.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 874207489 + 180902500 = 29567^2 + 13450^2 .

It is a cyclic number.

It is not a de Polignac number, because 1055109989 - 2¹⁶ = 1055044453 is a prime.

It is a super-2 number, since 2×1055109989² = 2226514177775160242, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1055109983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 527554994 + 527554995.

It is an arithmetic number, because the mean of its divisors is an integer number (527554995).

Almost surely, 2^1055109989 is an apocalyptic number.

It is an amenable number.

1055109989 is a deficient number, since it is larger than the sum of its proper divisors (1).

1055109989 is an equidigital number, since it uses as much as digits as its factorization.

1055109989 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 145800, while the sum is 47.

The square root of 1055109989 is about 32482.4566343126. The cubic root of 1055109989 is about 1018.0425064883.

The spelling of 1055109989 in words is "one billion, fifty-five million, one hundred nine thousand, nine hundred eighty-nine".