80396021 has 2 divisors, whose sum is σ = 80396022. Its totient is φ = 80396020.

The previous prime is 80396003. The next prime is 80396081. The reversal of 80396021 is 12069308.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 77880625 + 2515396 = 8825^2 + 1586^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-80396021 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 (80396081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40198010 + 40198011.

It is an arithmetic number, because the mean of its divisors is an integer number (40198011).

Almost surely, 2^80396021 is an apocalyptic number.

It is an amenable number.

80396021 is a deficient number, since it is larger than the sum of its proper divisors (1).

80396021 is an equidigital number, since it uses as much as digits as its factorization.

80396021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2592, while the sum is 29.

The square root of 80396021 is about 8966.3828269821. The cubic root of 80396021 is about 431.5967691585.

The spelling of 80396021 in words is "eighty million, three hundred ninety-six thousand, twenty-one".