80697517 has 8 divisors (see below), whose sum is σ = 83676600. Its totient is φ = 77731584.

The previous prime is 80697509. The next prime is 80697527. The reversal of 80697517 is 71579608.

It can be written as a sum of positive squares in 4 ways, for example, as 16152361 + 64545156 = 4019^2 + 8034^2 .

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 80697517 - 2³ = 80697509 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80697527) 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, 10209 + ... + 16297.

It is an arithmetic number, because the mean of its divisors is an integer number (10459575).

Almost surely, 2^80697517 is an apocalyptic number.

It is an amenable number.

80697517 is a deficient number, since it is larger than the sum of its proper divisors (2979083).

80697517 is a wasteful number, since it uses less digits than its factorization.

80697517 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6575.

The product of its (nonzero) digits is 105840, while the sum is 43.

The square root of 80697517 is about 8983.1796709183. The cubic root of 80697517 is about 432.1356116459.

The spelling of 80697517 in words is "eighty million, six hundred ninety-seven thousand, five hundred seventeen".