385487423999 has 4 divisors (see below), whose sum is σ = 395906003064. Its totient is φ = 375068844936.

The previous prime is 385487423977. The next prime is 385487424037. The reversal of 385487423999 is 999324784583.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 999324784583 = 193757 ⋅5157619.

It is a cyclic number.

It is not a de Polignac number, because 385487423999 - 2²⁰ = 385486375423 is a prime.

It is a super-2 number, since 2×385487423999² (a number of 24 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 (385487413999) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5209289477 + ... + 5209289550.

It is an arithmetic number, because the mean of its divisors is an integer number (98976500766).

Almost surely, 2^385487423999 is an apocalyptic number.

385487423999 is a deficient number, since it is larger than the sum of its proper divisors (10418579065).

385487423999 is a wasteful number, since it uses less digits than its factorization.

385487423999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10418579064.

The product of its digits is 470292480, while the sum is 71.

The spelling of 385487423999 in words is "three hundred eighty-five billion, four hundred eighty-seven million, four hundred twenty-three thousand, nine hundred ninety-nine".