5201639 has 2 divisors, whose sum is σ = 5201640. Its totient is φ = 5201638.

The previous prime is 5201633. The next prime is 5201641. The reversal of 5201639 is 9361025.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-5201639 is a prime.

Together with 5201641, it forms a pair of twin primes.

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 (5201633) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2600819 + 2600820.

It is an arithmetic number, because the mean of its divisors is an integer number (2600820).

Almost surely, 2^5201639 is an apocalyptic number.

5201639 is a deficient number, since it is larger than the sum of its proper divisors (1).

5201639 is an equidigital number, since it uses as much as digits as its factorization.

5201639 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1620, while the sum is 26.

The square root of 5201639 is about 2280.7101964081. The cubic root of 5201639 is about 173.2660212830.

The spelling of 5201639 in words is "five million, two hundred one thousand, six hundred thirty-nine".