1023421439 has 2 divisors, whose sum is σ = 1023421440. Its totient is φ = 1023421438.

The previous prime is 1023421423. The next prime is 1023421447. The reversal of 1023421439 is 9341243201.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1023421439 - 2⁴ = 1023421423 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1023429439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 511710719 + 511710720.

It is an arithmetic number, because the mean of its divisors is an integer number (511710720).

Almost surely, 2^1023421439 is an apocalyptic number.

1023421439 is a deficient number, since it is larger than the sum of its proper divisors (1).

1023421439 is an equidigital number, since it uses as much as digits as its factorization.

1023421439 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5184, while the sum is 29.

The square root of 1023421439 is about 31990.9587071097. The cubic root of 1023421439 is about 1007.7469757206.

The spelling of 1023421439 in words is "one billion, twenty-three million, four hundred twenty-one thousand, four hundred thirty-nine".