622648139 has 2 divisors, whose sum is σ = 622648140. Its totient is φ = 622648138.

The previous prime is 622648123. The next prime is 622648189. The reversal of 622648139 is 931846226.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 622648139 - 2⁴ = 622648123 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 622648096 and 622648105.

It is not a weakly prime, because it can be changed into another prime (622648189) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 311324069 + 311324070.

It is an arithmetic number, because the mean of its divisors is an integer number (311324070).

Almost surely, 2^622648139 is an apocalyptic number.

622648139 is a deficient number, since it is larger than the sum of its proper divisors (1).

622648139 is an equidigital number, since it uses as much as digits as its factorization.

622648139 is an evil number, because the sum of its binary digits is even.

The product of its digits is 124416, while the sum is 41.

The square root of 622648139 is about 24952.9184465465. The cubic root of 622648139 is about 853.9141918074.

The spelling of 622648139 in words is "six hundred twenty-two million, six hundred forty-eight thousand, one hundred thirty-nine".