8692716521 has 4 divisors (see below), whose sum is σ = 8693441412. Its totient is φ = 8691991632.

The previous prime is 8692716499. The next prime is 8692716523. The reversal of 8692716521 is 1256172968.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3166875625 + 5525840896 = 56275^2 + 74336^2 .

It is a cyclic number.

It is not a de Polignac number, because 8692716521 - 2⁶ = 8692716457 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8692716523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 344150 + ... + 368543.

It is an arithmetic number, because the mean of its divisors is an integer number (2173360353).

Almost surely, 2^8692716521 is an apocalyptic number.

It is an amenable number.

8692716521 is a deficient number, since it is larger than the sum of its proper divisors (724891).

8692716521 is a wasteful number, since it uses less digits than its factorization.

8692716521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 724890.

The product of its digits is 362880, while the sum is 47.

The square root of 8692716521 is about 93234.7388101667. The cubic root of 8692716521 is about 2056.1360094162.

The spelling of 8692716521 in words is "eight billion, six hundred ninety-two million, seven hundred sixteen thousand, five hundred twenty-one".