6978238907 has 2 divisors, whose sum is σ = 6978238908. Its totient is φ = 6978238906.

The previous prime is 6978238903. The next prime is 6978238963. The reversal of 6978238907 is 7098328796.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6978238907 - 2² = 6978238903 is a prime.

It is not a weakly prime, because it can be changed into another prime (6978238903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3489119453 + 3489119454.

It is an arithmetic number, because the mean of its divisors is an integer number (3489119454).

Almost surely, 2^6978238907 is an apocalyptic number.

6978238907 is a deficient number, since it is larger than the sum of its proper divisors (1).

6978238907 is an equidigital number, since it uses as much as digits as its factorization.

6978238907 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9144576, while the sum is 59.

The square root of 6978238907 is about 83535.8540208933. The cubic root of 6978238907 is about 1910.9468644780.

The spelling of 6978238907 in words is "six billion, nine hundred seventy-eight million, two hundred thirty-eight thousand, nine hundred seven".