80782973 has 2 divisors, whose sum is σ = 80782974. Its totient is φ = 80782972.

The previous prime is 80782957. The next prime is 80783011. The reversal of 80782973 is 37928708.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 71284249 + 9498724 = 8443^2 + 3082^2 .

It is a cyclic number.

It is not a de Polignac number, because 80782973 - 2⁴ = 80782957 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (80782903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40391486 + 40391487.

It is an arithmetic number, because the mean of its divisors is an integer number (40391487).

Almost surely, 2^80782973 is an apocalyptic number.

It is an amenable number.

80782973 is a deficient number, since it is larger than the sum of its proper divisors (1).

80782973 is an equidigital number, since it uses as much as digits as its factorization.

80782973 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 169344, while the sum is 44.

The square root of 80782973 is about 8987.9348573518. The cubic root of 80782973 is about 432.2880969370.

The spelling of 80782973 in words is "eighty million, seven hundred eighty-two thousand, nine hundred seventy-three".