1024121389 has 2 divisors, whose sum is σ = 1024121390. Its totient is φ = 1024121388.

The previous prime is 1024121387. The next prime is 1024121393. The reversal of 1024121389 is 9831214201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 989605764 + 34515625 = 31458^2 + 5875^2 .

It is an emirp because it is prime and its reverse (9831214201) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1024121389 - 2¹ = 1024121387 is a prime.

Together with 1024121387, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 1024121389.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1024121383) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 512060694 + 512060695.

It is an arithmetic number, because the mean of its divisors is an integer number (512060695).

Almost surely, 2^1024121389 is an apocalyptic number.

It is an amenable number.

1024121389 is a deficient number, since it is larger than the sum of its proper divisors (1).

1024121389 is an equidigital number, since it uses as much as digits as its factorization.

1024121389 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3456, while the sum is 31.

The square root of 1024121389 is about 32001.8966469177. The cubic root of 1024121389 is about 1007.9766666121.

The spelling of 1024121389 in words is "one billion, twenty-four million, one hundred twenty-one thousand, three hundred eighty-nine".