208194788623 has 4 divisors (see below), whose sum is σ = 213821674840. Its totient is φ = 202567902408.

The previous prime is 208194788563. The next prime is 208194788639. The reversal of 208194788623 is 326887491802.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 208194788623 - 2²⁹ = 207657917711 is a prime.

It is a super-2 number, since 2×208194788623² (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 (208194788663) 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, 2813443053 + ... + 2813443126.

It is an arithmetic number, because the mean of its divisors is an integer number (53455418710).

Almost surely, 2^208194788623 is an apocalyptic number.

208194788623 is a deficient number, since it is larger than the sum of its proper divisors (5626886217).

208194788623 is an equidigital number, since it uses as much as digits as its factorization.

208194788623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5626886216.

The product of its (nonzero) digits is 9289728, while the sum is 58.

The spelling of 208194788623 in words is "two hundred eight billion, one hundred ninety-four million, seven hundred eighty-eight thousand, six hundred twenty-three".