67001989 has 2 divisors, whose sum is σ = 67001990. Its totient is φ = 67001988.

The previous prime is 67001969. The next prime is 67002007. The reversal of 67001989 is 98910076.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 47128225 + 19873764 = 6865^2 + 4458^2 .

It is a cyclic number.

It is not a de Polignac number, because 67001989 - 2²¹ = 64904837 is a prime.

It is a super-2 number, since 2×67001989² = 8978533059912242, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (67001929) 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, 33500994 + 33500995.

It is an arithmetic number, because the mean of its divisors is an integer number (33500995).

Almost surely, 2^67001989 is an apocalyptic number.

It is an amenable number.

67001989 is a deficient number, since it is larger than the sum of its proper divisors (1).

67001989 is an equidigital number, since it uses as much as digits as its factorization.

67001989 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 27216, while the sum is 40.

The square root of 67001989 is about 8185.4742684832. The cubic root of 67001989 is about 406.1588291188.

The spelling of 67001989 in words is "sixty-seven million, one thousand, nine hundred eighty-nine".