43421087273 has 2 divisors, whose sum is σ = 43421087274. Its totient is φ = 43421087272.

The previous prime is 43421087267. The next prime is 43421087299. The reversal of 43421087273 is 37278012434.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 26175356944 + 17245730329 = 161788^2 + 131323^2 .

It is a cyclic number.

It is not a de Polignac number, because 43421087273 - 2⁶ = 43421087209 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 43421087273.

It is not a weakly prime, because it can be changed into another prime (43421087573) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21710543636 + 21710543637.

It is an arithmetic number, because the mean of its divisors is an integer number (21710543637).

Almost surely, 2^43421087273 is an apocalyptic number.

It is an amenable number.

43421087273 is a deficient number, since it is larger than the sum of its proper divisors (1).

43421087273 is an equidigital number, since it uses as much as digits as its factorization.

43421087273 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 225792, while the sum is 41.

The spelling of 43421087273 in words is "forty-three billion, four hundred twenty-one million, eighty-seven thousand, two hundred seventy-three".