8621617 has 2 divisors, whose sum is σ = 8621618. Its totient is φ = 8621616.

The previous prime is 8621609. The next prime is 8621623. The reversal of 8621617 is 7161268.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8620096 + 1521 = 2936^2 + 39^2 .

It is a cyclic number.

It is not a de Polignac number, because 8621617 - 2³ = 8621609 is a prime.

It is a super-3 number, since 3×8621617³ (a number of 22 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (8621677) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4310808 + 4310809.

It is an arithmetic number, because the mean of its divisors is an integer number (4310809).

Almost surely, 2^8621617 is an apocalyptic number.

It is an amenable number.

8621617 is a deficient number, since it is larger than the sum of its proper divisors (1).

8621617 is an equidigital number, since it uses as much as digits as its factorization.

8621617 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4032, while the sum is 31.

The square root of 8621617 is about 2936.2590144604. The cubic root of 8621617 is about 205.0514802299.

The spelling of 8621617 in words is "eight million, six hundred twenty-one thousand, six hundred seventeen".