80724881 has 2 divisors, whose sum is σ = 80724882. Its totient is φ = 80724880.

The previous prime is 80724851. The next prime is 80724907. The reversal of 80724881 is 18842708.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 75411856 + 5313025 = 8684^2 + 2305^2 .

It is a cyclic number.

It is not a de Polignac number, because 80724881 - 2⁶ = 80724817 is a prime.

It is a super-2 number, since 2×80724881² = 13033012824928322, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (80724811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40362440 + 40362441.

It is an arithmetic number, because the mean of its divisors is an integer number (40362441).

Almost surely, 2^80724881 is an apocalyptic number.

It is an amenable number.

80724881 is a deficient number, since it is larger than the sum of its proper divisors (1).

80724881 is an equidigital number, since it uses as much as digits as its factorization.

80724881 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 28672, while the sum is 38.

The square root of 80724881 is about 8984.7026105487. The cubic root of 80724881 is about 432.1844509121.

The spelling of 80724881 in words is "eighty million, seven hundred twenty-four thousand, eight hundred eighty-one".