993897439 has 2 divisors, whose sum is σ = 993897440. Its totient is φ = 993897438.

The previous prime is 993897407. The next prime is 993897473. The reversal of 993897439 is 934798399.

It is a weak prime.

It is an emirp because it is prime and its reverse (934798399) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 993897439 - 2⁵ = 993897407 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (993898439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 496948719 + 496948720.

It is an arithmetic number, because the mean of its divisors is an integer number (496948720).

Almost surely, 2^993897439 is an apocalyptic number.

993897439 is a deficient number, since it is larger than the sum of its proper divisors (1).

993897439 is an equidigital number, since it uses as much as digits as its factorization.

993897439 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13226976, while the sum is 61.

The square root of 993897439 is about 31526.1389802177. The cubic root of 993897439 is about 997.9616609971.

The spelling of 993897439 in words is "nine hundred ninety-three million, eight hundred ninety-seven thousand, four hundred thirty-nine".