2057639 has 2 divisors, whose sum is σ = 2057640. Its totient is φ = 2057638.

The previous prime is 2057633. The next prime is 2057659. The reversal of 2057639 is 9367502.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2057639 - 2⁸ = 2057383 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 (2057633) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1028819 + 1028820.

It is an arithmetic number, because the mean of its divisors is an integer number (1028820).

2^2057639 is an apocalyptic number.

2057639 is a deficient number, since it is larger than the sum of its proper divisors (1).

2057639 is an equidigital number, since it uses as much as digits as its factorization.

2057639 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11340, while the sum is 32.

The square root of 2057639 is about 1434.4472803139. The cubic root of 2057639 is about 127.1910036423.

The spelling of 2057639 in words is "two million, fifty-seven thousand, six hundred thirty-nine".