4645909 has 2 divisors, whose sum is σ = 4645910. Its totient is φ = 4645908.

The previous prime is 4645891. The next prime is 4645919. The reversal of 4645909 is 9095464.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4622500 + 23409 = 2150^2 + 153^2 .

It is a cyclic number.

It is not a de Polignac number, because 4645909 - 2²¹ = 2548757 is a prime.

4645909 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4645919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2322954 + 2322955.

It is an arithmetic number, because the mean of its divisors is an integer number (2322955).

Almost surely, 2^4645909 is an apocalyptic number.

It is an amenable number.

4645909 is a deficient number, since it is larger than the sum of its proper divisors (1).

4645909 is an equidigital number, since it uses as much as digits as its factorization.

4645909 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 38880, while the sum is 37.

The square root of 4645909 is about 2155.4370786455. The cubic root of 4645909 is about 166.8617905819.

The spelling of 4645909 in words is "four million, six hundred forty-five thousand, nine hundred nine".