80878013 has 8 divisors (see below), whose sum is σ = 83767800. Its totient is φ = 77995008.

The previous prime is 80877997. The next prime is 80878043. The reversal of 80878013 is 31087808.

It can be written as a sum of positive squares in 4 ways, for example, as 273529 + 80604484 = 523^2 + 8978^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 80878013 - 2⁴ = 80877997 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 (80878043) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42245 + ... + 44117.

It is an arithmetic number, because the mean of its divisors is an integer number (10470975).

Almost surely, 2^80878013 is an apocalyptic number.

It is an amenable number.

80878013 is a deficient number, since it is larger than the sum of its proper divisors (2889787).

80878013 is a wasteful number, since it uses less digits than its factorization.

80878013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3391.

The product of its (nonzero) digits is 10752, while the sum is 35.

The square root of 80878013 is about 8993.2203909389. The cubic root of 80878013 is about 432.4575573975.

The spelling of 80878013 in words is "eighty million, eight hundred seventy-eight thousand, thirteen".