61389443 has 4 divisors (see below), whose sum is σ = 61420920. Its totient is φ = 61357968.

The previous prime is 61389439. The next prime is 61389451. The reversal of 61389443 is 34498316.

61389443 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 61389443 - 2² = 61389439 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 61389397 and 61389406.

It is not an unprimeable number, because it can be changed into a prime (61389403) 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, 12605 + ... + 16782.

It is an arithmetic number, because the mean of its divisors is an integer number (15355230).

Almost surely, 2^61389443 is an apocalyptic number.

61389443 is a deficient number, since it is larger than the sum of its proper divisors (31477).

61389443 is a wasteful number, since it uses less digits than its factorization.

61389443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31476.

The product of its digits is 62208, while the sum is 38.

The square root of 61389443 is about 7835.1415430737. The cubic root of 61389443 is about 394.4856693069.

The spelling of 61389443 in words is "sixty-one million, three hundred eighty-nine thousand, four hundred forty-three".