61479139 has 2 divisors, whose sum is σ = 61479140. Its totient is φ = 61479138.

The previous prime is 61479127. The next prime is 61479151. The reversal of 61479139 is 93197416.

61479139 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a balanced prime because it is at equal distance from previous prime (61479127) and next prime (61479151).

It is a cyclic number.

It is not a de Polignac number, because 61479139 - 2¹⁹ = 60954851 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (61470139) 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, 30739569 + 30739570.

It is an arithmetic number, because the mean of its divisors is an integer number (30739570).

Almost surely, 2^61479139 is an apocalyptic number.

61479139 is a deficient number, since it is larger than the sum of its proper divisors (1).

61479139 is an equidigital number, since it uses as much as digits as its factorization.

61479139 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 40824, while the sum is 40.

The square root of 61479139 is about 7840.8634090896. The cubic root of 61479139 is about 394.6777032342.

The spelling of 61479139 in words is "sixty-one million, four hundred seventy-nine thousand, one hundred thirty-nine".