208620707069 has 4 divisors (see below), whose sum is σ = 210534658620. Its totient is φ = 206706755520.

The previous prime is 208620707027. The next prime is 208620707143. The reversal of 208620707069 is 960707026802.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 188409819844 + 20210887225 = 434062^2 + 142165^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-208620707069 is a prime.

It is a super-2 number, since 2×208620707069² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (208620707369) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 956975612 + ... + 956975829.

It is an arithmetic number, because the mean of its divisors is an integer number (52633664655).

Almost surely, 2^208620707069 is an apocalyptic number.

It is an amenable number.

208620707069 is a deficient number, since it is larger than the sum of its proper divisors (1913951551).

208620707069 is a wasteful number, since it uses less digits than its factorization.

208620707069 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1913951550.

The product of its (nonzero) digits is 508032, while the sum is 47.

The spelling of 208620707069 in words is "two hundred eight billion, six hundred twenty million, seven hundred seven thousand, sixty-nine".