378378733 has 2 divisors, whose sum is σ = 378378734. Its totient is φ = 378378732.

The previous prime is 378378731. The next prime is 378378743. The reversal of 378378733 is 337873873.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 374306409 + 4072324 = 19347^2 + 2018^2 .

It is an emirp because it is prime and its reverse (337873873) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 378378733 - 2¹ = 378378731 is a prime.

Together with 378378731, 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 (378378731) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 189189366 + 189189367.

It is an arithmetic number, because the mean of its divisors is an integer number (189189367).

Almost surely, 2^378378733 is an apocalyptic number.

It is an amenable number.

378378733 is a deficient number, since it is larger than the sum of its proper divisors (1).

378378733 is an equidigital number, since it uses as much as digits as its factorization.

378378733 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1778112, while the sum is 49.

The square root of 378378733 is about 19451.9596185063. The cubic root of 378378733 is about 723.2840802375.

The spelling of 378378733 in words is "three hundred seventy-eight million, three hundred seventy-eight thousand, seven hundred thirty-three".