2209555679 has 2 divisors, whose sum is σ = 2209555680. Its totient is φ = 2209555678.

The previous prime is 2209555643. The next prime is 2209555693. The reversal of 2209555679 is 9765559022.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2209555679 - 2²⁴ = 2192778463 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2209555639) 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, 1104777839 + 1104777840.

It is an arithmetic number, because the mean of its divisors is an integer number (1104777840).

Almost surely, 2^2209555679 is an apocalyptic number.

2209555679 is a deficient number, since it is larger than the sum of its proper divisors (1).

2209555679 is an equidigital number, since it uses as much as digits as its factorization.

2209555679 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1701000, while the sum is 50.

The square root of 2209555679 is about 47005.9111070087. The cubic root of 2209555679 is about 1302.4717626071.

The spelling of 2209555679 in words is "two billion, two hundred nine million, five hundred fifty-five thousand, six hundred seventy-nine".