1923898339439 has 2 divisors, whose sum is σ = 1923898339440. Its totient is φ = 1923898339438.

The previous prime is 1923898339427. The next prime is 1923898339459. The reversal of 1923898339439 is 9349338983291.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1923898339439 - 2³² = 1919603372143 is a prime.

It is a super-2 number, since 2×1923898339439² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1923898339409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 961949169719 + 961949169720.

It is an arithmetic number, because the mean of its divisors is an integer number (961949169720).

Almost surely, 2^{1923898339439} is an apocalyptic number.

1923898339439 is a deficient number, since it is larger than the sum of its proper divisors (1).

1923898339439 is an equidigital number, since it uses as much as digits as its factorization.

1923898339439 is an evil number, because the sum of its binary digits is even.

The product of its digits is 272097792, while the sum is 71.

The spelling of 1923898339439 in words is "one trillion, nine hundred twenty-three billion, eight hundred ninety-eight million, three hundred thirty-nine thousand, four hundred thirty-nine".