208374943009 has 2 divisors, whose sum is σ = 208374943010. Its totient is φ = 208374943008.

The previous prime is 208374942983. The next prime is 208374943031. The reversal of 208374943009 is 900349473802.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 106468427025 + 101906515984 = 326295^2 + 319228^2 .

It is a cyclic number.

It is not a de Polignac number, because 208374943009 - 2⁹ = 208374942497 is a prime.

It is not a weakly prime, because it can be changed into another prime (208374949009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 104187471504 + 104187471505.

It is an arithmetic number, because the mean of its divisors is an integer number (104187471505).

Almost surely, 2^208374943009 is an apocalyptic number.

It is an amenable number.

208374943009 is a deficient number, since it is larger than the sum of its proper divisors (1).

208374943009 is an equidigital number, since it uses as much as digits as its factorization.

208374943009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1306368, while the sum is 49.

The spelling of 208374943009 in words is "two hundred eight billion, three hundred seventy-four million, nine hundred forty-three thousand, nine".