80601721 has 2 divisors, whose sum is σ = 80601722. Its totient is φ = 80601720.

The previous prime is 80601673. The next prime is 80601751. The reversal of 80601721 is 12710608.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 43086096 + 37515625 = 6564^2 + 6125^2 .

It is a cyclic number.

It is not a de Polignac number, because 80601721 - 2⁷ = 80601593 is a prime.

It is not a weakly prime, because it can be changed into another prime (80601751) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40300860 + 40300861.

It is an arithmetic number, because the mean of its divisors is an integer number (40300861).

Almost surely, 2^80601721 is an apocalyptic number.

It is an amenable number.

80601721 is a deficient number, since it is larger than the sum of its proper divisors (1).

80601721 is an equidigital number, since it uses as much as digits as its factorization.

80601721 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 672, while the sum is 25.

The square root of 80601721 is about 8977.8461225396. The cubic root of 80601721 is about 431.9645479166.

The spelling of 80601721 in words is "eighty million, six hundred one thousand, seven hundred twenty-one".