6455639 has 2 divisors, whose sum is σ = 6455640. Its totient is φ = 6455638.

The previous prime is 6455623. The next prime is 6455677. The reversal of 6455639 is 9365546.

6455639 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an a-pointer prime, because the next prime (6455677) can be obtained adding 6455639 to its sum of digits (38).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6455639 - 2⁴ = 6455623 is a prime.

It is a Chen prime.

It is an Ulam number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6455689) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3227819 + 3227820.

It is an arithmetic number, because the mean of its divisors is an integer number (3227820).

Almost surely, 2^6455639 is an apocalyptic number.

6455639 is a deficient number, since it is larger than the sum of its proper divisors (1).

6455639 is an equidigital number, since it uses as much as digits as its factorization.

6455639 is an evil number, because the sum of its binary digits is even.

The product of its digits is 97200, while the sum is 38.

The square root of 6455639 is about 2540.7949543401. The cubic root of 6455639 is about 186.2000295352.

The spelling of 6455639 in words is "six million, four hundred fifty-five thousand, six hundred thirty-nine".