378904979 has 2 divisors, whose sum is σ = 378904980. Its totient is φ = 378904978.

The previous prime is 378904969. The next prime is 378905041. The reversal of 378904979 is 979409873.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 378904979 - 2¹⁶ = 378839443 is a prime.

It is a super-2 number, since 2×378904979² = 287137966221980882, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (378904969) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 189452489 + 189452490.

It is an arithmetic number, because the mean of its divisors is an integer number (189452490).

Almost surely, 2^378904979 is an apocalyptic number.

378904979 is a deficient number, since it is larger than the sum of its proper divisors (1).

378904979 is an equidigital number, since it uses as much as digits as its factorization.

378904979 is an evil number, because the sum of its binary digits is even.

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

The square root of 378904979 is about 19465.4817304890. The cubic root of 378904979 is about 723.6192374052.

The spelling of 378904979 in words is "three hundred seventy-eight million, nine hundred four thousand, nine hundred seventy-nine".