43720063 has 4 divisors (see below), whose sum is σ = 44786448. Its totient is φ = 42653680.

The previous prime is 43720049. The next prime is 43720123. The reversal of 43720063 is 36002734.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 36002734 = 2 ⋅18001367.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-43720063 is a prime.

It is a super-2 number, since 2×43720063² = 3822887817447938, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43721063) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 533131 + ... + 533212.

It is an arithmetic number, because the mean of its divisors is an integer number (11196612).

Almost surely, 2^43720063 is an apocalyptic number.

43720063 is a deficient number, since it is larger than the sum of its proper divisors (1066385).

43720063 is a wasteful number, since it uses less digits than its factorization.

43720063 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1066384.

The product of its (nonzero) digits is 3024, while the sum is 25.

The square root of 43720063 is about 6612.1148659109. The cubic root of 43720063 is about 352.2845468425.

Adding to 43720063 its reverse (36002734), we get a palindrome (79722797).

The spelling of 43720063 in words is "forty-three million, seven hundred twenty thousand, sixty-three".