8920609 has 2 divisors, whose sum is σ = 8920610. Its totient is φ = 8920608.

The previous prime is 8920567. The next prime is 8920649. The reversal of 8920609 is 9060298.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5626384 + 3294225 = 2372^2 + 1815^2 .

It is a cyclic number.

It is not a de Polignac number, because 8920609 - 2⁹ = 8920097 is a prime.

It is not a weakly prime, because it can be changed into another prime (8920649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4460304 + 4460305.

It is an arithmetic number, because the mean of its divisors is an integer number (4460305).

Almost surely, 2^8920609 is an apocalyptic number.

It is an amenable number.

8920609 is a deficient number, since it is larger than the sum of its proper divisors (1).

8920609 is an equidigital number, since it uses as much as digits as its factorization.

8920609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7776, while the sum is 34.

The square root of 8920609 is about 2986.7388570145. The cubic root of 8920609 is about 207.3949456117.

The spelling of 8920609 in words is "eight million, nine hundred twenty thousand, six hundred nine".