2626639 has 2 divisors, whose sum is σ = 2626640. Its totient is φ = 2626638.

The previous prime is 2626633. The next prime is 2626643. The reversal of 2626639 is 9366262.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2626639 - 2⁵ = 2626607 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2626633) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1313319 + 1313320.

It is an arithmetic number, because the mean of its divisors is an integer number (1313320).

2^2626639 is an apocalyptic number.

2626639 is a deficient number, since it is larger than the sum of its proper divisors (1).

2626639 is an equidigital number, since it uses as much as digits as its factorization.

2626639 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 23328, while the sum is 34.

The square root of 2626639 is about 1620.6909020538. The cubic root of 2626639 is about 137.9749131741.

The spelling of 2626639 in words is "two million, six hundred twenty-six thousand, six hundred thirty-nine".