67989787829 has 2 divisors, whose sum is σ = 67989787830. Its totient is φ = 67989787828.

The previous prime is 67989787823. The next prime is 67989787837. The reversal of 67989787829 is 92878798976.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 40574044900 + 27415742929 = 201430^2 + 165577^2 .

It is a cyclic number.

It is not a de Polignac number, because 67989787829 - 2¹² = 67989783733 is a prime.

It is a super-2 number, since 2×67989787829² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (67989787823) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33994893914 + 33994893915.

It is an arithmetic number, because the mean of its divisors is an integer number (33994893915).

Almost surely, 2^67989787829 is an apocalyptic number.

It is an amenable number.

67989787829 is a deficient number, since it is larger than the sum of its proper divisors (1).

67989787829 is an equidigital number, since it uses as much as digits as its factorization.

67989787829 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1536288768, while the sum is 80.

The spelling of 67989787829 in words is "sixty-seven billion, nine hundred eighty-nine million, seven hundred eighty-seven thousand, eight hundred twenty-nine".