209213468773 has 4 divisors (see below), whose sum is σ = 209284948800. Its totient is φ = 209141988748.

The previous prime is 209213468731. The next prime is 209213468777. The reversal of 209213468773 is 377864312902.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 209213468773 - 2¹³ = 209213460581 is a prime.

It is a super-2 number, since 2×209213468773² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 209213468773.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (209213468777) 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, 35735623 + ... + 35741476.

It is an arithmetic number, because the mean of its divisors is an integer number (52321237200).

Almost surely, 2^209213468773 is an apocalyptic number.

It is an amenable number.

209213468773 is a deficient number, since it is larger than the sum of its proper divisors (71480027).

209213468773 is an equidigital number, since it uses as much as digits as its factorization.

209213468773 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71480026.

The product of its (nonzero) digits is 3048192, while the sum is 52.

The spelling of 209213468773 in words is "two hundred nine billion, two hundred thirteen million, four hundred sixty-eight thousand, seven hundred seventy-three".