8216653 has 4 divisors (see below), whose sum is σ = 8298108. Its totient is φ = 8135200.

The previous prime is 8216647. The next prime is 8216669. The reversal of 8216653 is 3566128.

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 7300804 + 915849 = 2702^2 + 957^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8216653 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8216603) 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, 40576 + ... + 40777.

It is an arithmetic number, because the mean of its divisors is an integer number (2074527).

Almost surely, 2^8216653 is an apocalyptic number.

It is an amenable number.

8216653 is a deficient number, since it is larger than the sum of its proper divisors (81455).

8216653 is a wasteful number, since it uses less digits than its factorization.

8216653 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81454.

The product of its digits is 8640, while the sum is 31.

The square root of 8216653 is about 2866.4704777827. The cubic root of 8216653 is about 201.7893844381.

The spelling of 8216653 in words is "eight million, two hundred sixteen thousand, six hundred fifty-three".