850209396623 has 4 divisors (see below), whose sum is σ = 850211240760. Its totient is φ = 850207552488.

The previous prime is 850209396611. The next prime is 850209396661. The reversal of 850209396623 is 326693902058.

It is a Cunningham number, because it is equal to 922068²-1.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 850209396623 - 2¹⁰ = 850209395599 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (850209396523) 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, 461033 + ... + 1383101.

It is an arithmetic number, because the mean of its divisors is an integer number (212552810190).

Almost surely, 2^850209396623 is an apocalyptic number.

850209396623 is a deficient number, since it is larger than the sum of its proper divisors (1844137).

850209396623 is an equidigital number, since it uses as much as digits as its factorization.

850209396623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1844136.

The product of its (nonzero) digits is 4199040, while the sum is 53.

The spelling of 850209396623 in words is "eight hundred fifty billion, two hundred nine million, three hundred ninety-six thousand, six hundred twenty-three".