6371320387 has 4 divisors (see below), whose sum is σ = 6591021120. Its totient is φ = 6151619656.

The previous prime is 6371320381. The next prime is 6371320391. The reversal of 6371320387 is 7830231736.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 6371320387 - 2¹⁹ = 6370796099 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6371320381) 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, 109850323 + ... + 109850380.

It is an arithmetic number, because the mean of its divisors is an integer number (1647755280).

Almost surely, 2^6371320387 is an apocalyptic number.

6371320387 is a deficient number, since it is larger than the sum of its proper divisors (219700733).

6371320387 is a wasteful number, since it uses less digits than its factorization.

6371320387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 219700732.

The product of its (nonzero) digits is 127008, while the sum is 40.

The square root of 6371320387 is about 79820.5511569546. The cubic root of 6371320387 is about 1853.8580686170.

It can be divided in two parts, 63713 and 20387, that added together give a square (84100 = 290²).

The spelling of 6371320387 in words is "six billion, three hundred seventy-one million, three hundred twenty thousand, three hundred eighty-seven".