39313889 has 2 divisors, whose sum is σ = 39313890. Its totient is φ = 39313888.

The previous prime is 39313873. The next prime is 39313909. The reversal of 39313889 is 98831393.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 34023889 + 5290000 = 5833^2 + 2300^2 .

It is a cyclic number.

It is not a de Polignac number, because 39313889 - 2⁴ = 39313873 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (39313819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19656944 + 19656945.

It is an arithmetic number, because the mean of its divisors is an integer number (19656945).

Almost surely, 2^39313889 is an apocalyptic number.

It is an amenable number.

39313889 is a deficient number, since it is larger than the sum of its proper divisors (1).

39313889 is an equidigital number, since it uses as much as digits as its factorization.

39313889 is an evil number, because the sum of its binary digits is even.

The product of its digits is 139968, while the sum is 44.

The square root of 39313889 is about 6270.0788671276. The cubic root of 39313889 is about 340.0285126031.

The spelling of 39313889 in words is "thirty-nine million, three hundred thirteen thousand, eight hundred eighty-nine".