443421157 has 2 divisors, whose sum is σ = 443421158. Its totient is φ = 443421156.

The previous prime is 443421137. The next prime is 443421257. The reversal of 443421157 is 751124344.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 276856321 + 166564836 = 16639^2 + 12906^2 .

It is a cyclic number.

It is not a de Polignac number, because 443421157 - 2⁷ = 443421029 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (443421137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 221710578 + 221710579.

It is an arithmetic number, because the mean of its divisors is an integer number (221710579).

Almost surely, 2^443421157 is an apocalyptic number.

It is an amenable number.

443421157 is a deficient number, since it is larger than the sum of its proper divisors (1).

443421157 is an equidigital number, since it uses as much as digits as its factorization.

443421157 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13440, while the sum is 31.

The square root of 443421157 is about 21057.5676895505. The cubic root of 443421157 is about 762.5566924434.

The spelling of 443421157 in words is "four hundred forty-three million, four hundred twenty-one thousand, one hundred fifty-seven".