850721694923 has 2 divisors, whose sum is σ = 850721694924. Its totient is φ = 850721694922.

The previous prime is 850721694887. The next prime is 850721694937. The reversal of 850721694923 is 329496127058.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 850721694923 - 2¹⁸ = 850721432779 is a prime.

It is a Sophie Germain prime.

It is an alternating number because its digits alternate between even and odd.

It is not a weakly prime, because it can be changed into another prime (850721694983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 425360847461 + 425360847462.

It is an arithmetic number, because the mean of its divisors is an integer number (425360847462).

It is a 1-persistent number, because it is pandigital, but 2⋅850721694923 = 1701443389846 is not.

Almost surely, 2^850721694923 is an apocalyptic number.

850721694923 is a deficient number, since it is larger than the sum of its proper divisors (1).

850721694923 is an equidigital number, since it uses as much as digits as its factorization.

850721694923 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6531840, while the sum is 56.

The spelling of 850721694923 in words is "eight hundred fifty billion, seven hundred twenty-one million, six hundred ninety-four thousand, nine hundred twenty-three".