209788046973 has 24 divisors (see below), whose sum is σ = 307017223968. Its totient is φ = 138020866272.

The previous prime is 209788046947. The next prime is 209788047011. The reversal of 209788046973 is 379640887902.

209788046973 is a `hidden beast` number, since 2 + 0 + 97 + 8 + 80 + 469 + 7 + 3 = 666.

It is not a de Polignac number, because 209788046973 - 2¹³ = 209788038781 is a prime.

It is a super-2 number, since 2×209788046973² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 209788046973.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (209788046873) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 522711 + ... + 832347.

It is an arithmetic number, because the mean of its divisors is an integer number (12792384332).

Almost surely, 2^209788046973 is an apocalyptic number.

It is an amenable number.

209788046973 is a deficient number, since it is larger than the sum of its proper divisors (97229176995).

209788046973 is a wasteful number, since it uses less digits than its factorization.

209788046973 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 310633 (or 310630 counting only the distinct ones).

The product of its (nonzero) digits is 36578304, while the sum is 63.

The spelling of 209788046973 in words is "two hundred nine billion, seven hundred eighty-eight million, forty-six thousand, nine hundred seventy-three".