43087820137 has 2 divisors, whose sum is σ = 43087820138. Its totient is φ = 43087820136.

The previous prime is 43087820119. The next prime is 43087820143. The reversal of 43087820137 is 73102878034.

43087820137 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 42754246441 + 333573696 = 206771^2 + 18264^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-43087820137 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 43087820093 and 43087820102.

It is not a weakly prime, because it can be changed into another prime (43087820177) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21543910068 + 21543910069.

It is an arithmetic number, because the mean of its divisors is an integer number (21543910069).

Almost surely, 2^43087820137 is an apocalyptic number.

It is an amenable number.

43087820137 is a deficient number, since it is larger than the sum of its proper divisors (1).

43087820137 is an equidigital number, since it uses as much as digits as its factorization.

43087820137 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 225792, while the sum is 43.

The spelling of 43087820137 in words is "forty-three billion, eighty-seven million, eight hundred twenty thousand, one hundred thirty-seven".