80787713 has 8 divisors (see below), whose sum is σ = 82380648. Its totient is φ = 79208064.

The previous prime is 80787709. The next prime is 80787719. The reversal of 80787713 is 31778708.

It can be written as a sum of positive squares in 4 ways, for example, as 7907344 + 72880369 = 2812^2 + 8537^2 .

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 80787713 - 2² = 80787709 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (80787719) 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, 9431 + ... + 15827.

It is an arithmetic number, because the mean of its divisors is an integer number (10297581).

Almost surely, 2^80787713 is an apocalyptic number.

It is an amenable number.

80787713 is a deficient number, since it is larger than the sum of its proper divisors (1592935).

80787713 is a wasteful number, since it uses less digits than its factorization.

80787713 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6643.

The product of its (nonzero) digits is 65856, while the sum is 41.

The square root of 80787713 is about 8988.1985403083. The cubic root of 80787713 is about 432.2965517116.

The spelling of 80787713 in words is "eighty million, seven hundred eighty-seven thousand, seven hundred thirteen".