80315729 has 16 divisors (see below), whose sum is σ = 87964800. Its totient is φ = 73324368.

The previous prime is 80315713. The next prime is 80315731. The reversal of 80315729 is 92751308.

It is not a de Polignac number, because 80315729 - 2⁴ = 80315713 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80315749) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 305252 + ... + 305514.

It is an arithmetic number, because the mean of its divisors is an integer number (5497800).

Almost surely, 2^80315729 is an apocalyptic number.

It is an amenable number.

80315729 is a deficient number, since it is larger than the sum of its proper divisors (7649071).

80315729 is a wasteful number, since it uses less digits than its factorization.

80315729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 441 (or 415 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 35.

The square root of 80315729 is about 8961.9043177218. The cubic root of 80315729 is about 431.4530418526.

The spelling of 80315729 in words is "eighty million, three hundred fifteen thousand, seven hundred twenty-nine".