43487139 has 8 divisors (see below), whose sum is σ = 61393680. Its totient is φ = 27286016.

The previous prime is 43487063. The next prime is 43487149. The reversal of 43487139 is 93178434.

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 43487139 - 2¹⁵ = 43454371 is a prime.

It is a super-2 number, since 2×43487139² = 3782262516810642, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 43487097 and 43487106.

It is not an unprimeable number, because it can be changed into a prime (43487149) 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, 426294 + ... + 426395.

It is an arithmetic number, because the mean of its divisors is an integer number (7674210).

Almost surely, 2^43487139 is an apocalyptic number.

43487139 is a deficient number, since it is larger than the sum of its proper divisors (17906541).

43487139 is a wasteful number, since it uses less digits than its factorization.

43487139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 852709.

The product of its digits is 72576, while the sum is 39.

The square root of 43487139 is about 6594.4779171668. The cubic root of 43487139 is about 351.6578194830.

The spelling of 43487139 in words is "forty-three million, four hundred eighty-seven thousand, one hundred thirty-nine".