1042868389 has 2 divisors, whose sum is σ = 1042868390. Its totient is φ = 1042868388.

The previous prime is 1042868279. The next prime is 1042868399. The reversal of 1042868389 is 9838682401.

1042868389 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 901020289 + 141848100 = 30017^2 + 11910^2 .

It is a cyclic number.

It is not a de Polignac number, because 1042868389 - 2²⁵ = 1009313957 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1042868399) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 521434194 + 521434195.

It is an arithmetic number, because the mean of its divisors is an integer number (521434195).

Almost surely, 2^1042868389 is an apocalyptic number.

It is an amenable number.

1042868389 is a deficient number, since it is larger than the sum of its proper divisors (1).

1042868389 is an equidigital number, since it uses as much as digits as its factorization.

1042868389 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 663552, while the sum is 49.

The square root of 1042868389 is about 32293.4728544330. The cubic root of 1042868389 is about 1014.0900024113.

The spelling of 1042868389 in words is "one billion, forty-two million, eight hundred sixty-eight thousand, three hundred eighty-nine".