80443997 has 2 divisors, whose sum is σ = 80443998. Its totient is φ = 80443996.

The previous prime is 80443981. The next prime is 80444047. The reversal of 80443997 is 79934408.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 61136761 + 19307236 = 7819^2 + 4394^2 .

It is a cyclic number.

It is not a de Polignac number, because 80443997 - 2⁴ = 80443981 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (80443897) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40221998 + 40221999.

It is an arithmetic number, because the mean of its divisors is an integer number (40221999).

Almost surely, 2^80443997 is an apocalyptic number.

It is an amenable number.

80443997 is a deficient number, since it is larger than the sum of its proper divisors (1).

80443997 is an equidigital number, since it uses as much as digits as its factorization.

80443997 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 217728, while the sum is 44.

The square root of 80443997 is about 8969.0577543017. The cubic root of 80443997 is about 431.6826032952.

The spelling of 80443997 in words is "eighty million, four hundred forty-three thousand, nine hundred ninety-seven".