61667273 has 2 divisors, whose sum is σ = 61667274. Its totient is φ = 61667272.

The previous prime is 61667251. The next prime is 61667303. The reversal of 61667273 is 37276616.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 56505289 + 5161984 = 7517^2 + 2272^2 .

It is a cyclic number.

It is not a de Polignac number, because 61667273 - 2¹² = 61663177 is a prime.

It is not a weakly prime, because it can be changed into another prime (61667173) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30833636 + 30833637.

It is an arithmetic number, because the mean of its divisors is an integer number (30833637).

Almost surely, 2^61667273 is an apocalyptic number.

It is an amenable number.

61667273 is a deficient number, since it is larger than the sum of its proper divisors (1).

61667273 is an equidigital number, since it uses as much as digits as its factorization.

61667273 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 63504, while the sum is 38.

The square root of 61667273 is about 7852.8512656232. The cubic root of 61667273 is about 395.0798812968.

The spelling of 61667273 in words is "sixty-one million, six hundred sixty-seven thousand, two hundred seventy-three".