164378047 has 2 divisors, whose sum is σ = 164378048. Its totient is φ = 164378046.

The previous prime is 164378023. The next prime is 164378057. The reversal of 164378047 is 740873461.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 164378047 - 2⁷ = 164377919 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (164378017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82189023 + 82189024.

It is an arithmetic number, because the mean of its divisors is an integer number (82189024).

Almost surely, 2^164378047 is an apocalyptic number.

164378047 is a deficient number, since it is larger than the sum of its proper divisors (1).

164378047 is an equidigital number, since it uses as much as digits as its factorization.

164378047 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 112896, while the sum is 40.

The square root of 164378047 is about 12821.0002339911. Note that the first 3 decimals coincide. The cubic root of 164378047 is about 547.7906376521.

The spelling of 164378047 in words is "one hundred sixty-four million, three hundred seventy-eight thousand, forty-seven".