67649377 has 2 divisors, whose sum is σ = 67649378. Its totient is φ = 67649376.

The previous prime is 67649369. The next prime is 67649383. The reversal of 67649377 is 77394676.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 47900241 + 19749136 = 6921^2 + 4444^2 .

It is a cyclic number.

It is not a de Polignac number, because 67649377 - 2³ = 67649369 is a prime.

It is equal to p_3987859 and since 67649377 and 3987859 have the same sum of digits, it is a Honaker prime.

It is a self number, because there is not a number n which added to its sum of digits gives 67649377.

It is not a weakly prime, because it can be changed into another prime (67649327) 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, 33824688 + 33824689.

It is an arithmetic number, because the mean of its divisors is an integer number (33824689).

Almost surely, 2^67649377 is an apocalyptic number.

It is an amenable number.

67649377 is a deficient number, since it is larger than the sum of its proper divisors (1).

67649377 is an equidigital number, since it uses as much as digits as its factorization.

67649377 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1333584, while the sum is 49.

The square root of 67649377 is about 8224.9241333887. The cubic root of 67649377 is about 407.4627705082.

The spelling of 67649377 in words is "sixty-seven million, six hundred forty-nine thousand, three hundred seventy-seven".