8216705 has 16 divisors (see below), whose sum is σ = 11633664. Its totient is φ = 5451840.

The previous prime is 8216693. The next prime is 8216717. The reversal of 8216705 is 5076128.

It is an interprime number because it is at equal distance from previous prime (8216693) and next prime (8216717).

It is not a de Polignac number, because 8216705 - 2⁶ = 8216641 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2702 + ... + 4871.

It is an arithmetic number, because the mean of its divisors is an integer number (727104).

Almost surely, 2^8216705 is an apocalyptic number.

It is an amenable number.

8216705 is a deficient number, since it is larger than the sum of its proper divisors (3416959).

8216705 is a wasteful number, since it uses less digits than its factorization.

8216705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7616.

The product of its (nonzero) digits is 3360, while the sum is 29.

The square root of 8216705 is about 2866.4795481566. The cubic root of 8216705 is about 201.7898101194.

The spelling of 8216705 in words is "eight million, two hundred sixteen thousand, seven hundred five".