80712869 has 2 divisors, whose sum is σ = 80712870. Its totient is φ = 80712868.

The previous prime is 80712851. The next prime is 80712883. The reversal of 80712869 is 96821708.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 76772644 + 3940225 = 8762^2 + 1985^2 .

It is a cyclic number.

It is not a de Polignac number, because 80712869 - 2⁸ = 80712613 is a prime.

It is a super-2 number, since 2×80712869² = 13029134444422322, which contains 22 as substring.

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 (80712169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40356434 + 40356435.

It is an arithmetic number, because the mean of its divisors is an integer number (40356435).

Almost surely, 2^80712869 is an apocalyptic number.

It is an amenable number.

80712869 is a deficient number, since it is larger than the sum of its proper divisors (1).

80712869 is an equidigital number, since it uses as much as digits as its factorization.

80712869 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48384, while the sum is 41.

The square root of 80712869 is about 8984.0341161418. The cubic root of 80712869 is about 432.1630132542.

The spelling of 80712869 in words is "eighty million, seven hundred twelve thousand, eight hundred sixty-nine".