6311639 has 2 divisors, whose sum is σ = 6311640. Its totient is φ = 6311638.

The previous prime is 6311633. The next prime is 6311659. The reversal of 6311639 is 9361136.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6311639 - 2⁴ = 6311623 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6311633) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3155819 + 3155820.

It is an arithmetic number, because the mean of its divisors is an integer number (3155820).

Almost surely, 2^6311639 is an apocalyptic number.

6311639 is a deficient number, since it is larger than the sum of its proper divisors (1).

6311639 is an equidigital number, since it uses as much as digits as its factorization.

6311639 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2916, while the sum is 29.

The square root of 6311639 is about 2512.2975540330. The cubic root of 6311639 is about 184.8051417989.

The spelling of 6311639 in words is "six million, three hundred eleven thousand, six hundred thirty-nine".