8729905 has 8 divisors (see below), whose sum is σ = 10502784. Its totient is φ = 6966000.

The previous prime is 8729887. The next prime is 8729923. The reversal of 8729905 is 5099278.

It is an interprime number because it is at equal distance from previous prime (8729887) and next prime (8729923).

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

It is not a de Polignac number, because 8729905 - 2¹¹ = 8727857 is a prime.

It is a super-2 number, since 2×8729905² = 152422482618050, which contains 22 as substring.

It is a Duffinian 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, 130 + ... + 4180.

It is an arithmetic number, because the mean of its divisors is an integer number (1312848).

Almost surely, 2^8729905 is an apocalyptic number.

It is an amenable number.

8729905 is a deficient number, since it is larger than the sum of its proper divisors (1772879).

8729905 is a wasteful number, since it uses less digits than its factorization.

8729905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4487.

The product of its (nonzero) digits is 45360, while the sum is 40.

The square root of 8729905 is about 2954.6412641808. The cubic root of 8729905 is about 205.9063969758.

It can be divided in two parts, 87 and 29905, that added together give a palindrome (29992).

The spelling of 8729905 in words is "eight million, seven hundred twenty-nine thousand, nine hundred five".