61478539 has 2 divisors, whose sum is σ = 61478540. Its totient is φ = 61478538.

The previous prime is 61478533. The next prime is 61478551. The reversal of 61478539 is 93587416.

61478539 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 61478539 - 2⁷ = 61478411 is a prime.

It is a super-2 number, since 2×61478539² = 7559221515149042, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 61478495 and 61478504.

It is not a weakly prime, because it can be changed into another prime (61478533) 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, 30739269 + 30739270.

It is an arithmetic number, because the mean of its divisors is an integer number (30739270).

Almost surely, 2^61478539 is an apocalyptic number.

61478539 is a deficient number, since it is larger than the sum of its proper divisors (1).

61478539 is an equidigital number, since it uses as much as digits as its factorization.

61478539 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 181440, while the sum is 43.

The square root of 61478539 is about 7840.8251479038. The cubic root of 61478539 is about 394.6764192898.

The spelling of 61478539 in words is "sixty-one million, four hundred seventy-eight thousand, five hundred thirty-nine".