8661697 has 4 divisors (see below), whose sum is σ = 9449136. Its totient is φ = 7874260.

The previous prime is 8661689. The next prime is 8661703. The reversal of 8661697 is 7961668.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 8661697 - 2³ = 8661689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8661197) 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, 393703 + ... + 393724.

It is an arithmetic number, because the mean of its divisors is an integer number (2362284).

Almost surely, 2^8661697 is an apocalyptic number.

It is an amenable number.

8661697 is a deficient number, since it is larger than the sum of its proper divisors (787439).

8661697 is a wasteful number, since it uses less digits than its factorization.

8661697 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 787438.

The product of its digits is 108864, while the sum is 43.

The square root of 8661697 is about 2943.0761118259. The cubic root of 8661697 is about 205.3687355213.

The spelling of 8661697 in words is "eight million, six hundred sixty-one thousand, six hundred ninety-seven".