67679749 has 2 divisors, whose sum is σ = 67679750. Its totient is φ = 67679748.

The previous prime is 67679741. The next prime is 67679753. The reversal of 67679749 is 94797676.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 67354849 + 324900 = 8207^2 + 570^2 .

It is a cyclic number.

It is not a de Polignac number, because 67679749 - 2³ = 67679741 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 67679749.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (67679741) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33839874 + 33839875.

It is an arithmetic number, because the mean of its divisors is an integer number (33839875).

Almost surely, 2^67679749 is an apocalyptic number.

It is an amenable number.

67679749 is a deficient number, since it is larger than the sum of its proper divisors (1).

67679749 is an equidigital number, since it uses as much as digits as its factorization.

67679749 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4000752, while the sum is 55.

The square root of 67679749 is about 8226.7702654201. The cubic root of 67679749 is about 407.5237398191.

The spelling of 67679749 in words is "sixty-seven million, six hundred seventy-nine thousand, seven hundred forty-nine".