67669949 has 2 divisors, whose sum is σ = 67669950. Its totient is φ = 67669948.

The previous prime is 67669919. The next prime is 67669997. The reversal of 67669949 is 94996676.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 63840100 + 3829849 = 7990^2 + 1957^2 .

It is a cyclic number.

It is not a de Polignac number, because 67669949 - 2²⁴ = 50892733 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 67669894 and 67669903.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (67669919) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33834974 + 33834975.

It is an arithmetic number, because the mean of its divisors is an integer number (33834975).

Almost surely, 2^67669949 is an apocalyptic number.

It is an amenable number.

67669949 is a deficient number, since it is larger than the sum of its proper divisors (1).

67669949 is an equidigital number, since it uses as much as digits as its factorization.

67669949 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4408992, while the sum is 56.

The square root of 67669949 is about 8226.1746273709. The cubic root of 67669949 is about 407.5040691126.

The spelling of 67669949 in words is "sixty-seven million, six hundred sixty-nine thousand, nine hundred forty-nine".