67645049 has 2 divisors, whose sum is σ = 67645050. Its totient is φ = 67645048.

The previous prime is 67645027. The next prime is 67645051. The reversal of 67645049 is 94054676.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 47169424 + 20475625 = 6868^2 + 4525^2 .

It is a cyclic number.

It is not a de Polignac number, because 67645049 - 2²⁴ = 50867833 is a prime.

Together with 67645051, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 67644997 and 67645015.

It is not a weakly prime, because it can be changed into another prime (67645099) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33822524 + 33822525.

It is an arithmetic number, because the mean of its divisors is an integer number (33822525).

Almost surely, 2^67645049 is an apocalyptic number.

It is an amenable number.

67645049 is a deficient number, since it is larger than the sum of its proper divisors (1).

67645049 is an equidigital number, since it uses as much as digits as its factorization.

67645049 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 181440, while the sum is 41.

The square root of 67645049 is about 8224.6610264497. The cubic root of 67645049 is about 407.4540809161.

The spelling of 67645049 in words is "sixty-seven million, six hundred forty-five thousand, forty-nine".