8164643 has 2 divisors, whose sum is σ = 8164644. Its totient is φ = 8164642.

The previous prime is 8164621. The next prime is 8164657. The reversal of 8164643 is 3464618.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 8164643 - 2⁶ = 8164579 is a prime.

It is a super-2 number, since 2×8164643² = 133322790634898, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (8164603) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4082321 + 4082322.

It is an arithmetic number, because the mean of its divisors is an integer number (4082322).

Almost surely, 2^8164643 is an apocalyptic number.

8164643 is a deficient number, since it is larger than the sum of its proper divisors (1).

8164643 is an equidigital number, since it uses as much as digits as its factorization.

8164643 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13824, while the sum is 32.

The square root of 8164643 is about 2857.3839434000. The cubic root of 8164643 is about 201.3627188979.

The spelling of 8164643 in words is "eight million, one hundred sixty-four thousand, six hundred forty-three".