8663429 has 4 divisors (see below), whose sum is σ = 8743020. Its totient is φ = 8583840.

The previous prime is 8663401. The next prime is 8663437. The reversal of 8663429 is 9243668.

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 5166529 + 3496900 = 2273^2 + 1870^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8663429 is a prime.

It is a super-4 number, since 4×8663429⁴ (a number of 29 digits) contains 4444 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 8663392 and 8663401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8665429) 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, 39632 + ... + 39849.

It is an arithmetic number, because the mean of its divisors is an integer number (2185755).

Almost surely, 2^8663429 is an apocalyptic number.

It is an amenable number.

8663429 is a deficient number, since it is larger than the sum of its proper divisors (79591).

8663429 is a wasteful number, since it uses less digits than its factorization.

8663429 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79590.

The product of its digits is 62208, while the sum is 38.

The square root of 8663429 is about 2943.3703470681. The cubic root of 8663429 is about 205.3824231756.

The spelling of 8663429 in words is "eight million, six hundred sixty-three thousand, four hundred twenty-nine".