387626321 has 4 divisors (see below), whose sum is σ = 389025972. Its totient is φ = 386226672.

The previous prime is 387626251. The next prime is 387626339. The reversal of 387626321 is 123626783.

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

It can be written as a sum of positive squares in 2 ways, for example, as 169650625 + 217975696 = 13025^2 + 14764^2 .

It is a cyclic number.

It is not a de Polignac number, because 387626321 - 2¹⁰ = 387625297 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (387625321) 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, 699410 + ... + 699963.

It is an arithmetic number, because the mean of its divisors is an integer number (97256493).

Almost surely, 2^387626321 is an apocalyptic number.

It is an amenable number.

387626321 is a deficient number, since it is larger than the sum of its proper divisors (1399651).

387626321 is a wasteful number, since it uses less digits than its factorization.

387626321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1399650.

The product of its digits is 72576, while the sum is 38.

The square root of 387626321 is about 19688.2279801916. The cubic root of 387626321 is about 729.1290802169.

The spelling of 387626321 in words is "three hundred eighty-seven million, six hundred twenty-six thousand, three hundred twenty-one".