1113020989 has 2 divisors, whose sum is σ = 1113020990. Its totient is φ = 1113020988.

The previous prime is 1113020981. The next prime is 1113021001. The reversal of 1113020989 is 9890203111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1111088889 + 1932100 = 33333^2 + 1390^2 .

It is a cyclic number.

It is not a de Polignac number, because 1113020989 - 2³ = 1113020981 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1113020981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 556510494 + 556510495.

It is an arithmetic number, because the mean of its divisors is an integer number (556510495).

Almost surely, 2^1113020989 is an apocalyptic number.

It is an amenable number.

1113020989 is a deficient number, since it is larger than the sum of its proper divisors (1).

1113020989 is an equidigital number, since it uses as much as digits as its factorization.

1113020989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3888, while the sum is 34.

The square root of 1113020989 is about 33361.9692014725. The cubic root of 1113020989 is about 1036.3372724201.

The spelling of 1113020989 in words is "one billion, one hundred thirteen million, twenty thousand, nine hundred eighty-nine".