378778723 has 2 divisors, whose sum is σ = 378778724. Its totient is φ = 378778722.

The previous prime is 378778721. The next prime is 378778759. The reversal of 378778723 is 327877873.

It is a weak prime.

It is an emirp because it is prime and its reverse (327877873) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 378778723 - 2¹ = 378778721 is a prime.

Together with 378778721, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (378778721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 189389361 + 189389362.

It is an arithmetic number, because the mean of its divisors is an integer number (189389362).

Almost surely, 2^378778723 is an apocalyptic number.

378778723 is a deficient number, since it is larger than the sum of its proper divisors (1).

378778723 is an equidigital number, since it uses as much as digits as its factorization.

378778723 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2765952, while the sum is 52.

The square root of 378778723 is about 19462.2383861672. The cubic root of 378778723 is about 723.5388554053.

The spelling of 378778723 in words is "three hundred seventy-eight million, seven hundred seventy-eight thousand, seven hundred twenty-three".