61475539 has 4 divisors (see below), whose sum is σ = 61843824. Its totient is φ = 61107256.

The previous prime is 61475521. The next prime is 61475543. The reversal of 61475539 is 93557416.

61475539 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 61475539 - 2⁷ = 61475411 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61475639) 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 in 3 ways as a sum of consecutive naturals, for example, 183892 + ... + 184225.

It is an arithmetic number, because the mean of its divisors is an integer number (15460956).

Almost surely, 2^61475539 is an apocalyptic number.

61475539 is a deficient number, since it is larger than the sum of its proper divisors (368285).

61475539 is a wasteful number, since it uses less digits than its factorization.

61475539 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 368284.

The product of its digits is 113400, while the sum is 40.

The square root of 61475539 is about 7840.6338391740. The cubic root of 61475539 is about 394.6699994424.

The spelling of 61475539 in words is "sixty-one million, four hundred seventy-five thousand, five hundred thirty-nine".