67601689 has 2 divisors, whose sum is σ = 67601690. Its totient is φ = 67601688.

The previous prime is 67601687. The next prime is 67601711. The reversal of 67601689 is 98610676.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 59290000 + 8311689 = 7700^2 + 2883^2 .

It is a cyclic number.

It is not a de Polignac number, because 67601689 - 2¹ = 67601687 is a prime.

Together with 67601687, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (67601687) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33800844 + 33800845.

It is an arithmetic number, because the mean of its divisors is an integer number (33800845).

Almost surely, 2^67601689 is an apocalyptic number.

It is an amenable number.

67601689 is a deficient number, since it is larger than the sum of its proper divisors (1).

67601689 is an equidigital number, since it uses as much as digits as its factorization.

67601689 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108864, while the sum is 43.

The square root of 67601689 is about 8222.0246290071. The cubic root of 67601689 is about 407.3670039095.

The spelling of 67601689 in words is "sixty-seven million, six hundred one thousand, six hundred eighty-nine".