378133709 has 2 divisors, whose sum is σ = 378133710. Its totient is φ = 378133708.

The previous prime is 378133699. The next prime is 378133711. The reversal of 378133709 is 907331873.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 215443684 + 162690025 = 14678^2 + 12755^2 .

It is a cyclic number.

It is not a de Polignac number, because 378133709 - 2⁸ = 378133453 is a prime.

Together with 378133711, 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 (378136709) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 189066854 + 189066855.

It is an arithmetic number, because the mean of its divisors is an integer number (189066855).

Almost surely, 2^378133709 is an apocalyptic number.

It is an amenable number.

378133709 is a deficient number, since it is larger than the sum of its proper divisors (1).

378133709 is an equidigital number, since it uses as much as digits as its factorization.

378133709 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 95256, while the sum is 41.

The square root of 378133709 is about 19445.6604156300. The cubic root of 378133709 is about 723.1279225654.

The spelling of 378133709 in words is "three hundred seventy-eight million, one hundred thirty-three thousand, seven hundred nine".