378656933 has 2 divisors, whose sum is σ = 378656934. Its totient is φ = 378656932.

The previous prime is 378656923. The next prime is 378656959. The reversal of 378656933 is 339656873.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 316199524 + 62457409 = 17782^2 + 7903^2 .

It is a cyclic number.

It is not a de Polignac number, because 378656933 - 2⁴ = 378656917 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (378656923) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 189328466 + 189328467.

It is an arithmetic number, because the mean of its divisors is an integer number (189328467).

Almost surely, 2^378656933 is an apocalyptic number.

It is an amenable number.

378656933 is a deficient number, since it is larger than the sum of its proper divisors (1).

378656933 is an equidigital number, since it uses as much as digits as its factorization.

378656933 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2449440, while the sum is 50.

The square root of 378656933 is about 19459.1092550507. The cubic root of 378656933 is about 723.4612997966.

The spelling of 378656933 in words is "three hundred seventy-eight million, six hundred fifty-six thousand, nine hundred thirty-three".