80726013 has 24 divisors (see below), whose sum is σ = 124004088. Its totient is φ = 50429952.

The previous prime is 80726011. The next prime is 80726029. The reversal of 80726013 is 31062708.

It can be written as a sum of positive squares in 4 ways, for example, as 47858724 + 32867289 = 6918^2 + 5733^2 .

It is not a de Polignac number, because 80726013 - 2¹ = 80726011 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80726011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 38295 + ... + 40347.

It is an arithmetic number, because the mean of its divisors is an integer number (5166837).

Almost surely, 2^80726013 is an apocalyptic number.

It is an amenable number.

80726013 is a deficient number, since it is larger than the sum of its proper divisors (43278075).

80726013 is a wasteful number, since it uses less digits than its factorization.

80726013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2333 (or 2330 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 27.

The square root of 80726013 is about 8984.7656062916. The cubic root of 80726013 is about 432.1864710679.

The spelling of 80726013 in words is "eighty million, seven hundred twenty-six thousand, thirteen".