42661973 has 8 divisors (see below), whose sum is σ = 45170400. Its totient is φ = 40179888.

The previous prime is 42661963. The next prime is 42661981. The reversal of 42661973 is 37916624.

42661973 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 42661973 - 2¹⁸ = 42399829 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42661903) 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 7 ways as a sum of consecutive naturals, for example, 3203 + ... + 9776.

It is an arithmetic number, because the mean of its divisors is an integer number (5646300).

Almost surely, 2^42661973 is an apocalyptic number.

It is an amenable number.

42661973 is a deficient number, since it is larger than the sum of its proper divisors (2508427).

42661973 is a wasteful number, since it uses less digits than its factorization.

42661973 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13171.

The product of its digits is 54432, while the sum is 38.

The square root of 42661973 is about 6531.6133535291. The cubic root of 42661973 is about 349.4193720012.

It can be divided in two parts, 42661 and 973, that added together give a palindrome (43634).

The spelling of 42661973 in words is "forty-two million, six hundred sixty-one thousand, nine hundred seventy-three".