387316753321 has 4 divisors (see below), whose sum is σ = 396763503444. Its totient is φ = 377870003200.

The previous prime is 387316753319. The next prime is 387316753331. The reversal of 387316753321 is 123357613783.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 123357613783 = 787 ⋅156744109.

It can be written as a sum of positive squares in 2 ways, for example, as 60841648921 + 326475104400 = 246661^2 + 571380^2 .

It is a cyclic number.

It is not a de Polignac number, because 387316753321 - 2¹ = 387316753319 is a prime.

It is a Smith number, since the sum of its digits (49) 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 (387316753331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4723375000 + ... + 4723375081.

It is an arithmetic number, because the mean of its divisors is an integer number (99190875861).

Almost surely, 2^387316753321 is an apocalyptic number.

It is an amenable number.

387316753321 is a deficient number, since it is larger than the sum of its proper divisors (9446750123).

387316753321 is an equidigital number, since it uses as much as digits as its factorization.

387316753321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9446750122.

The product of its digits is 1905120, while the sum is 49.

The spelling of 387316753321 in words is "three hundred eighty-seven billion, three hundred sixteen million, seven hundred fifty-three thousand, three hundred twenty-one".