387476993 has 4 divisors (see below), whose sum is σ = 388254000. Its totient is φ = 386699988.

The previous prime is 387476981. The next prime is 387477001. The reversal of 387476993 is 399674783.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-387476993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (387476933) 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, 387755 + ... + 388752.

It is an arithmetic number, because the mean of its divisors is an integer number (97063500).

Almost surely, 2^387476993 is an apocalyptic number.

It is an amenable number.

387476993 is a deficient number, since it is larger than the sum of its proper divisors (777007).

387476993 is an equidigital number, since it uses as much as digits as its factorization.

387476993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 777006.

The product of its digits is 6858432, while the sum is 56.

The square root of 387476993 is about 19684.4352979708. The cubic root of 387476993 is about 729.0354390254.

The spelling of 387476993 in words is "three hundred eighty-seven million, four hundred seventy-six thousand, nine hundred ninety-three".