43172873 has 2 divisors, whose sum is σ = 43172874. Its totient is φ = 43172872.

The previous prime is 43172869. The next prime is 43172879. The reversal of 43172873 is 37827134.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24880144 + 18292729 = 4988^2 + 4277^2 .

It is a cyclic number.

It is not a de Polignac number, because 43172873 - 2² = 43172869 is a prime.

It is not a weakly prime, because it can be changed into another prime (43172879) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21586436 + 21586437.

It is an arithmetic number, because the mean of its divisors is an integer number (21586437).

Almost surely, 2^43172873 is an apocalyptic number.

It is an amenable number.

43172873 is a deficient number, since it is larger than the sum of its proper divisors (1).

43172873 is an equidigital number, since it uses as much as digits as its factorization.

43172873 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 28224, while the sum is 35.

The square root of 43172873 is about 6570.6067451948. The cubic root of 43172873 is about 350.8086689210.

The spelling of 43172873 in words is "forty-three million, one hundred seventy-two thousand, eight hundred seventy-three".