1010042989 has 4 divisors (see below), whose sum is σ = 1010920156. Its totient is φ = 1009165824.

The previous prime is 1010042977. The next prime is 1010042993. The reversal of 1010042989 is 9892400101.

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

It can be written as a sum of positive squares in 2 ways, for example, as 381538089 + 628504900 = 19533^2 + 25070^2 .

It is a cyclic number.

It is not a de Polignac number, because 1010042989 - 2¹³ = 1010034797 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 (1010042389) 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 in 3 ways as a sum of consecutive naturals, for example, 436854 + ... + 439159.

It is an arithmetic number, because the mean of its divisors is an integer number (252730039).

Almost surely, 2^1010042989 is an apocalyptic number.

It is an amenable number.

1010042989 is a deficient number, since it is larger than the sum of its proper divisors (877167).

1010042989 is an equidigital number, since it uses as much as digits as its factorization.

1010042989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 877166.

The product of its (nonzero) digits is 5184, while the sum is 34.

The square root of 1010042989 is about 31781.1734994163. The cubic root of 1010042989 is about 1003.3365182648.

The spelling of 1010042989 in words is "one billion, ten million, forty-two thousand, nine hundred eighty-nine".