167444404397 has 2 divisors, whose sum is σ = 167444404398. Its totient is φ = 167444404396.

The previous prime is 167444404373. The next prime is 167444404447. The reversal of 167444404397 is 793404444761.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 106089609796 + 61354794601 = 325714^2 + 247699^2 .

It is a cyclic number.

It is not a de Polignac number, because 167444404397 - 2¹⁶ = 167444338861 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (167444404367) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83722202198 + 83722202199.

It is an arithmetic number, because the mean of its divisors is an integer number (83722202199).

Almost surely, 2^167444404397 is an apocalyptic number.

It is an amenable number.

167444404397 is a deficient number, since it is larger than the sum of its proper divisors (1).

167444404397 is an equidigital number, since it uses as much as digits as its factorization.

167444404397 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8128512, while the sum is 53.

The spelling of 167444404397 in words is "one hundred sixty-seven billion, four hundred forty-four million, four hundred four thousand, three hundred ninety-seven".