5642909 has 2 divisors, whose sum is σ = 5642910. Its totient is φ = 5642908.

The previous prime is 5642873. The next prime is 5642911. The reversal of 5642909 is 9092465.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5522500 + 120409 = 2350^2 + 347^2 .

It is a cyclic number.

It is not a de Polignac number, because 5642909 - 2⁸ = 5642653 is a prime.

Together with 5642911, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5642969) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2821454 + 2821455.

It is an arithmetic number, because the mean of its divisors is an integer number (2821455).

Almost surely, 2^5642909 is an apocalyptic number.

It is an amenable number.

5642909 is a deficient number, since it is larger than the sum of its proper divisors (1).

5642909 is an equidigital number, since it uses as much as digits as its factorization.

5642909 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 19440, while the sum is 35.

The square root of 5642909 is about 2375.4807934395. The cubic root of 5642909 is about 178.0332072035.

The spelling of 5642909 in words is "five million, six hundred forty-two thousand, nine hundred nine".