43000013 has 8 divisors (see below), whose sum is σ = 50070528. Its totient is φ = 36161424.

The previous prime is 42999977. The next prime is 43000019. The reversal of 43000013 is 31000034.

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 43000013 - 2⁸ = 42999757 is a prime.

It is a super-3 number, since 3×43000013³ (a number of 24 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 42999958 and 43000003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43000019) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 57581 + ... + 58322.

It is an arithmetic number, because the mean of its divisors is an integer number (6258816).

Almost surely, 2^43000013 is an apocalyptic number.

It is an amenable number.

43000013 is a deficient number, since it is larger than the sum of its proper divisors (7070515).

43000013 is a wasteful number, since it uses less digits than its factorization.

43000013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115963.

The product of its (nonzero) digits is 36, while the sum is 11.

The square root of 43000013 is about 6557.4395155426. The cubic root of 43000013 is about 350.3398413442.

Adding to 43000013 its reverse (31000034), we get a palindrome (74000047).

The spelling of 43000013 in words is "forty-three million, thirteen", and thus it is an aban number and an uban number.