61005289 has 2 divisors, whose sum is σ = 61005290. Its totient is φ = 61005288.

The previous prime is 61005283. The next prime is 61005311. The reversal of 61005289 is 98250016.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 47499664 + 13505625 = 6892^2 + 3675^2 .

It is a cyclic number.

It is not a de Polignac number, because 61005289 - 2¹⁵ = 60972521 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 61005289.

It is not a weakly prime, because it can be changed into another prime (61005283) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30502644 + 30502645.

It is an arithmetic number, because the mean of its divisors is an integer number (30502645).

Almost surely, 2^61005289 is an apocalyptic number.

It is an amenable number.

61005289 is a deficient number, since it is larger than the sum of its proper divisors (1).

61005289 is an equidigital number, since it uses as much as digits as its factorization.

61005289 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4320, while the sum is 31.

The square root of 61005289 is about 7810.5882620965. The cubic root of 61005289 is about 393.6610951036.

The spelling of 61005289 in words is "sixty-one million, five thousand, two hundred eighty-nine".