2399389 has 2 divisors, whose sum is σ = 2399390. Its totient is φ = 2399388.

The previous prime is 2399387. The next prime is 2399399. The reversal of 2399389 is 9839932.

It is a happy number.

2399389 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2088025 + 311364 = 1445^2 + 558^2 .

It is a cyclic number.

It is not a de Polignac number, because 2399389 - 2¹ = 2399387 is a prime.

It is a super-3 number, since 3×2399389³ = 41440333823049302607, which contains 333 as substring.

Together with 2399387, 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 (2399381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1199694 + 1199695.

It is an arithmetic number, because the mean of its divisors is an integer number (1199695).

2^2399389 is an apocalyptic number.

It is an amenable number.

2399389 is a deficient number, since it is larger than the sum of its proper divisors (1).

2399389 is an equidigital number, since it uses as much as digits as its factorization.

2399389 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 104976, while the sum is 43.

The square root of 2399389 is about 1548.9961265284. The cubic root of 2399389 is about 133.8752272873.

The spelling of 2399389 in words is "two million, three hundred ninety-nine thousand, three hundred eighty-nine".