43607865139 has 2 divisors, whose sum is σ = 43607865140. Its totient is φ = 43607865138.

The previous prime is 43607865121. The next prime is 43607865173. The reversal of 43607865139 is 93156870634.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 43607865139 - 2⁹ = 43607864627 is a prime.

It is a super-2 number, since 2×43607865139² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (43607860139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21803932569 + 21803932570.

It is an arithmetic number, because the mean of its divisors is an integer number (21803932570).

Almost surely, 2^43607865139 is an apocalyptic number.

43607865139 is a deficient number, since it is larger than the sum of its proper divisors (1).

43607865139 is an equidigital number, since it uses as much as digits as its factorization.

43607865139 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3265920, while the sum is 52.

The spelling of 43607865139 in words is "forty-three billion, six hundred seven million, eight hundred sixty-five thousand, one hundred thirty-nine".