61085579 has 2 divisors, whose sum is σ = 61085580. Its totient is φ = 61085578.

The previous prime is 61085567. The next prime is 61085587. The reversal of 61085579 is 97558016.

61085579 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 61085579 - 2¹² = 61081483 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (61085279) 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, 30542789 + 30542790.

It is an arithmetic number, because the mean of its divisors is an integer number (30542790).

Almost surely, 2^61085579 is an apocalyptic number.

61085579 is a deficient number, since it is larger than the sum of its proper divisors (1).

61085579 is an equidigital number, since it uses as much as digits as its factorization.

61085579 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 75600, while the sum is 41.

The square root of 61085579 is about 7815.7263897862. The cubic root of 61085579 is about 393.8337205366.

The spelling of 61085579 in words is "sixty-one million, eighty-five thousand, five hundred seventy-nine".