939539389 has 2 divisors, whose sum is σ = 939539390. Its totient is φ = 939539388.

The previous prime is 939539387. The next prime is 939539407. The reversal of 939539389 is 983935939.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 825412900 + 114126489 = 28730^2 + 10683^2 .

It is a cyclic number.

It is not a de Polignac number, because 939539389 - 2¹ = 939539387 is a prime.

Together with 939539387, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (939539387) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 469769694 + 469769695.

It is an arithmetic number, because the mean of its divisors is an integer number (469769695).

Almost surely, 2^939539389 is an apocalyptic number.

It is an amenable number.

939539389 is a deficient number, since it is larger than the sum of its proper divisors (1).

939539389 is an equidigital number, since it uses as much as digits as its factorization.

939539389 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7085880, while the sum is 58.

The square root of 939539389 is about 30651.9067759251. The cubic root of 939539389 is about 979.4260796885.

It can be divided in two parts, 9395 and 39389, that added together give a palindrome (48784).

The spelling of 939539389 in words is "nine hundred thirty-nine million, five hundred thirty-nine thousand, three hundred eighty-nine".