8697403521 has 12 divisors (see below), whose sum is σ = 12775847760. Its totient is φ = 5699992920.

The previous prime is 8697403499. The next prime is 8697403529. The reversal of 8697403521 is 1253047968.

8697403521 is a `hidden beast` number, since 86 + 9 + 7 + 40 + 3 + 521 = 666.

8697403521 is digitally balanced in base 10, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 8697403521 - 2⁶ = 8697403457 is a prime.

8697403521 is strictly pandigital in base 10.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (8697403529) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8189115 + ... + 8190176.

It is an arithmetic number, because the mean of its divisors is an integer number (1064653980).

It is a 1-persistent number, because it is pandigital, but 2⋅8697403521 = 17394807042 is not.

Almost surely, 2^8697403521 is an apocalyptic number.

It is an amenable number.

8697403521 is a deficient number, since it is larger than the sum of its proper divisors (4078444239).

8697403521 is a wasteful number, since it uses less digits than its factorization.

8697403521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16379356 (or 16379353 counting only the distinct ones).

The product of its (nonzero) digits is 362880, while the sum is 45.

The square root of 8697403521 is about 93259.8709038352. The cubic root of 8697403521 is about 2056.5054903068.

The spelling of 8697403521 in words is "eight billion, six hundred ninety-seven million, four hundred three thousand, five hundred twenty-one".