8429705 has 8 divisors (see below), whose sum is σ = 10710792. Its totient is φ = 6347008.

The previous prime is 8429699. The next prime is 8429717. The reversal of 8429705 is 5079248.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 499849 + 7929856 = 707^2 + 2816^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 8429705 - 2⁴ = 8429689 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 49502 + ... + 49671.

It is an arithmetic number, because the mean of its divisors is an integer number (1338849).

Almost surely, 2^8429705 is an apocalyptic number.

8429705 is a gapful number since it is divisible by the number (85) formed by its first and last digit.

It is an amenable number.

8429705 is a deficient number, since it is larger than the sum of its proper divisors (2281087).

8429705 is a wasteful number, since it uses less digits than its factorization.

8429705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99195.

The product of its (nonzero) digits is 20160, while the sum is 35.

The square root of 8429705 is about 2903.3954260486. The cubic root of 8429705 is about 203.5186089348.

The spelling of 8429705 in words is "eight million, four hundred twenty-nine thousand, seven hundred five".