39238889 has 2 divisors, whose sum is σ = 39238890. Its totient is φ = 39238888.

The previous prime is 39238879. The next prime is 39238891. The reversal of 39238889 is 98883293.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20403289 + 18835600 = 4517^2 + 4340^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-39238889 is a prime.

It is a Sophie Germain prime.

Together with 39238891, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (39238879) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19619444 + 19619445.

It is an arithmetic number, because the mean of its divisors is an integer number (19619445).

Almost surely, 2^39238889 is an apocalyptic number.

It is an amenable number.

39238889 is a deficient number, since it is larger than the sum of its proper divisors (1).

39238889 is an equidigital number, since it uses as much as digits as its factorization.

39238889 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 746496, while the sum is 50.

The square root of 39238889 is about 6264.0952259684. The cubic root of 39238889 is about 339.8121482485.

The spelling of 39238889 in words is "thirty-nine million, two hundred thirty-eight thousand, eight hundred eighty-nine".