5647639 has 2 divisors, whose sum is σ = 5647640. Its totient is φ = 5647638.

The previous prime is 5647637. The next prime is 5647651. The reversal of 5647639 is 9367465.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 5647639 - 2¹ = 5647637 is a prime.

Together with 5647637, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5647633) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2823819 + 2823820.

It is an arithmetic number, because the mean of its divisors is an integer number (2823820).

Almost surely, 2^5647639 is an apocalyptic number.

5647639 is a deficient number, since it is larger than the sum of its proper divisors (1).

5647639 is an equidigital number, since it uses as much as digits as its factorization.

5647639 is an evil number, because the sum of its binary digits is even.

The product of its digits is 136080, while the sum is 40.

The square root of 5647639 is about 2376.4761728240. The cubic root of 5647639 is about 178.0829369849.

The spelling of 5647639 in words is "five million, six hundred forty-seven thousand, six hundred thirty-nine".