8693398897 has 4 divisors (see below), whose sum is σ = 8693589220. Its totient is φ = 8693208576.

The previous prime is 8693398853. The next prime is 8693398937. The reversal of 8693398897 is 7988933968.

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 7764429456 + 928969441 = 88116^2 + 30479^2 .

It is a 3-Lehmer number, since φ(8693398897) divides (8693398897-1)³.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8693398897 is a prime.

It is a deceptive number, since it divides R_8693398896.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8693398997) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19033 + ... + 133225.

It is an arithmetic number, because the mean of its divisors is an integer number (2173397305).

It is a Poulet number, since it divides 2^8693398896-1.

Almost surely, 2^8693398897 is an apocalyptic number.

8693398897 is the 76129-th pentagonal number.

It is an amenable number.

8693398897 is a deficient number, since it is larger than the sum of its proper divisors (190323).

8693398897 is a wasteful number, since it uses less digits than its factorization.

8693398897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 190322.

The product of its digits is 141087744, while the sum is 70.

The square root of 8693398897 is about 93238.3981898016. The cubic root of 8693398897 is about 2056.1898100568.

The spelling of 8693398897 in words is "eight billion, six hundred ninety-three million, three hundred ninety-eight thousand, eight hundred ninety-seven".