387543993 has 8 divisors (see below), whose sum is σ = 528742368. Its totient is φ = 252354144.

The previous prime is 387543991. The next prime is 387544021. The reversal of 387543993 is 399345783.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 387543993 - 2¹ = 387543991 is a prime.

It is not an unprimeable number, because it can be changed into a prime (387543991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1501980 + ... + 1502237.

It is an arithmetic number, because the mean of its divisors is an integer number (66092796).

Almost surely, 2^387543993 is an apocalyptic number.

It is an amenable number.

387543993 is a deficient number, since it is larger than the sum of its proper divisors (141198375).

387543993 is a wasteful number, since it uses less digits than its factorization.

387543993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3004263.

The product of its digits is 2449440, while the sum is 51.

The square root of 387543993 is about 19686.1370766334. The cubic root of 387543993 is about 729.0774566249.

The spelling of 387543993 in words is "three hundred eighty-seven million, five hundred forty-three thousand, nine hundred ninety-three".