378873239 has 2 divisors, whose sum is σ = 378873240. Its totient is φ = 378873238.

The previous prime is 378873233. The next prime is 378873241. The reversal of 378873239 is 932378873.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-378873239 is a prime.

It is a super-2 number, since 2×378873239² = 287089862460702242, which contains 22 as substring.

Together with 378873241, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (378873233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 189436619 + 189436620.

It is an arithmetic number, because the mean of its divisors is an integer number (189436620).

Almost surely, 2^378873239 is an apocalyptic number.

378873239 is a deficient number, since it is larger than the sum of its proper divisors (1).

378873239 is an equidigital number, since it uses as much as digits as its factorization.

378873239 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1524096, while the sum is 50.

The square root of 378873239 is about 19464.6664240618. Note that the first 3 decimals coincide. The cubic root of 378873239 is about 723.5990315337.

The spelling of 378873239 in words is "three hundred seventy-eight million, eight hundred seventy-three thousand, two hundred thirty-nine".