2439378397 has 2 divisors, whose sum is σ = 2439378398. Its totient is φ = 2439378396.

The previous prime is 2439378341. The next prime is 2439378401. The reversal of 2439378397 is 7938739342.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2187807076 + 251571321 = 46774^2 + 15861^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2439378397 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2439378317) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1219689198 + 1219689199.

It is an arithmetic number, because the mean of its divisors is an integer number (1219689199).

Almost surely, 2^2439378397 is an apocalyptic number.

It is an amenable number.

2439378397 is a deficient number, since it is larger than the sum of its proper divisors (1).

2439378397 is an equidigital number, since it uses as much as digits as its factorization.

2439378397 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6858432, while the sum is 55.

The square root of 2439378397 is about 49390.0637476811. The cubic root of 2439378397 is about 1346.1487671778.

The spelling of 2439378397 in words is "two billion, four hundred thirty-nine million, three hundred seventy-eight thousand, three hundred ninety-seven".