208274082869 has 2 divisors, whose sum is σ = 208274082870. Its totient is φ = 208274082868.

The previous prime is 208274082857. The next prime is 208274082911. The reversal of 208274082869 is 968280472802.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 203604000625 + 4670082244 = 451225^2 + 68338^2 .

It is a cyclic number.

It is not a de Polignac number, because 208274082869 - 2⁴ = 208274082853 is a prime.

It is a super-2 number, since 2×208274082869² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (208273082869) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 104137041434 + 104137041435.

It is an arithmetic number, because the mean of its divisors is an integer number (104137041435).

Almost surely, 2^208274082869 is an apocalyptic number.

It is an amenable number.

208274082869 is a deficient number, since it is larger than the sum of its proper divisors (1).

208274082869 is an equidigital number, since it uses as much as digits as its factorization.

208274082869 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6193152, while the sum is 56.

The spelling of 208274082869 in words is "two hundred eight billion, two hundred seventy-four million, eighty-two thousand, eight hundred sixty-nine".