2106558739 has 2 divisors, whose sum is σ = 2106558740. Its totient is φ = 2106558738.

The previous prime is 2106558719. The next prime is 2106558749. The reversal of 2106558739 is 9378556012.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2106558739 - 2⁷ = 2106558611 is a prime.

It is not a weakly prime, because it can be changed into another prime (2106558719) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1053279369 + 1053279370.

It is an arithmetic number, because the mean of its divisors is an integer number (1053279370).

Almost surely, 2^2106558739 is an apocalyptic number.

2106558739 is a deficient number, since it is larger than the sum of its proper divisors (1).

2106558739 is an equidigital number, since it uses as much as digits as its factorization.

2106558739 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 453600, while the sum is 46.

The square root of 2106558739 is about 45897.2628704588. The cubic root of 2106558739 is about 1281.9109516104.

The spelling of 2106558739 in words is "two billion, one hundred six million, five hundred fifty-eight thousand, seven hundred thirty-nine".