61939943 has 16 divisors (see below), whose sum is σ = 73274880. Its totient is φ = 51806304.

The previous prime is 61939931. The next prime is 61939973. The reversal of 61939943 is 34993916.

61939943 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 61939943 - 2¹⁴ = 61923559 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 61939894 and 61939903.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61939973) 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 15 ways as a sum of consecutive naturals, for example, 230 + ... + 11132.

It is an arithmetic number, because the mean of its divisors is an integer number (4579680).

Almost surely, 2^61939943 is an apocalyptic number.

61939943 is a deficient number, since it is larger than the sum of its proper divisors (11334937).

61939943 is a wasteful number, since it uses less digits than its factorization.

61939943 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10958.

The product of its digits is 157464, while the sum is 44.

The square root of 61939943 is about 7870.1933267233. The cubic root of 61939943 is about 395.6613244693.

The spelling of 61939943 in words is "sixty-one million, nine hundred thirty-nine thousand, nine hundred forty-three".