80728031 has 2 divisors, whose sum is σ = 80728032. Its totient is φ = 80728030.

The previous prime is 80728009. The next prime is 80728079. The reversal of 80728031 is 13082708.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 80728031 - 2²² = 76533727 is a prime.

It is a super-2 number, since 2×80728031² = 13034029978273922, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 80727985 and 80728003.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (80728231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40364015 + 40364016.

It is an arithmetic number, because the mean of its divisors is an integer number (40364016).

Almost surely, 2^80728031 is an apocalyptic number.

80728031 is a deficient number, since it is larger than the sum of its proper divisors (1).

80728031 is an equidigital number, since it uses as much as digits as its factorization.

80728031 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2688, while the sum is 29.

The square root of 80728031 is about 8984.8779067943. The cubic root of 80728031 is about 432.1900723235.

The spelling of 80728031 in words is "eighty million, seven hundred twenty-eight thousand, thirty-one".