2009237858669 has 2 divisors, whose sum is σ = 2009237858670. Its totient is φ = 2009237858668.

The previous prime is 2009237858651. The next prime is 2009237858689. The reversal of 2009237858669 is 9668587329002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1822473000100 + 186764858569 = 1349990^2 + 432163^2 .

It is a cyclic number.

It is not a de Polignac number, because 2009237858669 - 2⁸ = 2009237858413 is a prime.

It is a super-2 number, since 2×2009237858669² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2009237858689) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1004618929334 + 1004618929335.

It is an arithmetic number, because the mean of its divisors is an integer number (1004618929335).

Almost surely, 2^{2009237858669} is an apocalyptic number.

It is an amenable number.

2009237858669 is a deficient number, since it is larger than the sum of its proper divisors (1).

2009237858669 is an equidigital number, since it uses as much as digits as its factorization.

2009237858669 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 78382080, while the sum is 65.

The spelling of 2009237858669 in words is "two trillion, nine billion, two hundred thirty-seven million, eight hundred fifty-eight thousand, six hundred sixty-nine".