43670139 has 4 divisors (see below), whose sum is σ = 58226856. Its totient is φ = 29113424.

The previous prime is 43670119. The next prime is 43670141. The reversal of 43670139 is 93107634.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 43670139 - 2⁸ = 43669883 is a prime.

It is not an unprimeable number, because it can be changed into a prime (43670119) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7278354 + ... + 7278359.

It is an arithmetic number, because the mean of its divisors is an integer number (14556714).

Almost surely, 2^43670139 is an apocalyptic number.

43670139 is a deficient number, since it is larger than the sum of its proper divisors (14556717).

43670139 is a wasteful number, since it uses less digits than its factorization.

43670139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14556716.

The product of its (nonzero) digits is 13608, while the sum is 33.

The square root of 43670139 is about 6608.3385960467. The cubic root of 43670139 is about 352.1504043677.

The spelling of 43670139 in words is "forty-three million, six hundred seventy thousand, one hundred thirty-nine".