67630249 has 4 divisors (see below), whose sum is σ = 68250820. Its totient is φ = 67009680.

The previous prime is 67630231. The next prime is 67630259. The reversal of 67630249 is 94203676.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 30603024 + 37027225 = 5532^2 + 6085^2 .

It is a cyclic number.

It is not a de Polignac number, because 67630249 - 2⁵ = 67630217 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (67630219) 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 in 3 ways as a sum of consecutive naturals, for example, 310122 + ... + 310339.

It is an arithmetic number, because the mean of its divisors is an integer number (17062705).

Almost surely, 2^67630249 is an apocalyptic number.

It is an amenable number.

67630249 is a deficient number, since it is larger than the sum of its proper divisors (620571).

67630249 is a wasteful number, since it uses less digits than its factorization.

67630249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 620570.

The product of its (nonzero) digits is 54432, while the sum is 37.

The square root of 67630249 is about 8223.7612441024. The cubic root of 67630249 is about 407.4243632436.

The spelling of 67630249 in words is "sixty-seven million, six hundred thirty thousand, two hundred forty-nine".