505006639 has 2 divisors, whose sum is σ = 505006640. Its totient is φ = 505006638.

The previous prime is 505006633. The next prime is 505006657. The reversal of 505006639 is 936600505.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 505006639 - 2²⁵ = 471452207 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (505006633) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 252503319 + 252503320.

It is an arithmetic number, because the mean of its divisors is an integer number (252503320).

Almost surely, 2^505006639 is an apocalyptic number.

505006639 is a deficient number, since it is larger than the sum of its proper divisors (1).

505006639 is an equidigital number, since it uses as much as digits as its factorization.

505006639 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24300, while the sum is 34.

The square root of 505006639 is about 22472.3527695700. The cubic root of 505006639 is about 796.3409138561.

The spelling of 505006639 in words is "five hundred five million, six thousand, six hundred thirty-nine".