378691967 has 2 divisors, whose sum is σ = 378691968. Its totient is φ = 378691966.

The previous prime is 378691931. The next prime is 378691979. The reversal of 378691967 is 769196873.

It is a strong prime.

It is an emirp because it is prime and its reverse (769196873) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 378691967 - 2¹² = 378687871 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (378691667) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 189345983 + 189345984.

It is an arithmetic number, because the mean of its divisors is an integer number (189345984).

Almost surely, 2^378691967 is an apocalyptic number.

378691967 is a deficient number, since it is larger than the sum of its proper divisors (1).

378691967 is an equidigital number, since it uses as much as digits as its factorization.

378691967 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3429216, while the sum is 56.

The square root of 378691967 is about 19460.0094295969. The cubic root of 378691967 is about 723.4836110756.

The spelling of 378691967 in words is "three hundred seventy-eight million, six hundred ninety-one thousand, nine hundred sixty-seven".