1989034806467 has 2 divisors, whose sum is σ = 1989034806468. Its totient is φ = 1989034806466.

The previous prime is 1989034806449. The next prime is 1989034806511. The reversal of 1989034806467 is 7646084309891.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1989034806467 - 2¹² = 1989034802371 is a prime.

It is a super-2 number, since 2×1989034806467² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1989034806167) 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, 994517403233 + 994517403234.

It is an arithmetic number, because the mean of its divisors is an integer number (994517403234).

Almost surely, 2^{1989034806467} is an apocalyptic number.

1989034806467 is a deficient number, since it is larger than the sum of its proper divisors (1).

1989034806467 is an equidigital number, since it uses as much as digits as its factorization.

1989034806467 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 62705664, while the sum is 65.

The spelling of 1989034806467 in words is "one trillion, nine hundred eighty-nine billion, thirty-four million, eight hundred six thousand, four hundred sixty-seven".