8429661 has 24 divisors (see below), whose sum is σ = 12831936. Its totient is φ = 5322240.

The previous prime is 8429657. The next prime is 8429669. The reversal of 8429661 is 1669248.

It is not a de Polignac number, because 8429661 - 2² = 8429657 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8429669) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 39846 + ... + 40056.

It is an arithmetic number, because the mean of its divisors is an integer number (534664).

Almost surely, 2^8429661 is an apocalyptic number.

It is an amenable number.

8429661 is a deficient number, since it is larger than the sum of its proper divisors (4402275).

8429661 is a wasteful number, since it uses less digits than its factorization.

8429661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 433 (or 430 counting only the distinct ones).

The product of its digits is 20736, while the sum is 36.

The square root of 8429661 is about 2903.3878487036. The cubic root of 8429661 is about 203.5182548364.

The spelling of 8429661 in words is "eight million, four hundred twenty-nine thousand, six hundred sixty-one".