385004623891 has 2 divisors, whose sum is σ = 385004623892. Its totient is φ = 385004623890.

The previous prime is 385004623853. The next prime is 385004623903. The reversal of 385004623891 is 198326400583.

It is a strong prime.

It is an emirp because it is prime and its reverse (198326400583) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 385004623891 - 2³⁵ = 350644885523 is a prime.

It is not a weakly prime, because it can be changed into another prime (385004623831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 192502311945 + 192502311946.

It is an arithmetic number, because the mean of its divisors is an integer number (192502311946).

Almost surely, 2^385004623891 is an apocalyptic number.

385004623891 is a deficient number, since it is larger than the sum of its proper divisors (1).

385004623891 is an equidigital number, since it uses as much as digits as its factorization.

385004623891 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1244160, while the sum is 49.

The spelling of 385004623891 in words is "three hundred eighty-five billion, four million, six hundred twenty-three thousand, eight hundred ninety-one".