80444921 has 2 divisors, whose sum is σ = 80444922. Its totient is φ = 80444920.

The previous prime is 80444863. The next prime is 80444929. The reversal of 80444921 is 12944408.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 69973225 + 10471696 = 8365^2 + 3236^2 .

It is a cyclic number.

It is not a de Polignac number, because 80444921 - 2¹⁰ = 80443897 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (80444929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40222460 + 40222461.

It is an arithmetic number, because the mean of its divisors is an integer number (40222461).

Almost surely, 2^80444921 is an apocalyptic number.

It is an amenable number.

80444921 is a deficient number, since it is larger than the sum of its proper divisors (1).

80444921 is an equidigital number, since it uses as much as digits as its factorization.

80444921 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9216, while the sum is 32.

The square root of 80444921 is about 8969.1092645814. The cubic root of 80444921 is about 431.6842560939.

The spelling of 80444921 in words is "eighty million, four hundred forty-four thousand, nine hundred twenty-one".