67989709453 has 2 divisors, whose sum is σ = 67989709454. Its totient is φ = 67989709452.

The previous prime is 67989709439. The next prime is 67989709493. The reversal of 67989709453 is 35490798976.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 47185397284 + 20804312169 = 217222^2 + 144237^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-67989709453 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (67989709493) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33994854726 + 33994854727.

It is an arithmetic number, because the mean of its divisors is an integer number (33994854727).

Almost surely, 2^67989709453 is an apocalyptic number.

It is an amenable number.

67989709453 is a deficient number, since it is larger than the sum of its proper divisors (1).

67989709453 is an equidigital number, since it uses as much as digits as its factorization.

67989709453 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 102876480, while the sum is 67.

The spelling of 67989709453 in words is "sixty-seven billion, nine hundred eighty-nine million, seven hundred nine thousand, four hundred fifty-three".