5999639 has 2 divisors, whose sum is σ = 5999640. Its totient is φ = 5999638.

The previous prime is 5999633. The next prime is 5999663. The reversal of 5999639 is 9369995.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-5999639 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5999633) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2999819 + 2999820.

It is an arithmetic number, because the mean of its divisors is an integer number (2999820).

Almost surely, 2^5999639 is an apocalyptic number.

5999639 is a deficient number, since it is larger than the sum of its proper divisors (1).

5999639 is an equidigital number, since it uses as much as digits as its factorization.

5999639 is an evil number, because the sum of its binary digits is even.

The product of its digits is 590490, while the sum is 50.

The square root of 5999639 is about 2449.4160528583. The cubic root of 5999639 is about 181.7084148738.

The spelling of 5999639 in words is "five million, nine hundred ninety-nine thousand, six hundred thirty-nine".