387331 has 4 divisors (see below), whose sum is σ = 442672. Its totient is φ = 331992.

The previous prime is 387329. The next prime is 387341. The reversal of 387331 is 133783.

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 387331 - 2¹ = 387329 is a prime.

It is a super-2 number, since 2×387331² = 300050607122, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 387296 and 387305.

It is not an unprimeable number, because it can be changed into a prime (387341) 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, 27660 + ... + 27673.

It is an arithmetic number, because the mean of its divisors is an integer number (110668).

2³⁸⁷³³¹ is an apocalyptic number.

387331 is a deficient number, since it is larger than the sum of its proper divisors (55341).

387331 is an equidigital number, since it uses as much as digits as its factorization.

387331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55340.

The product of its digits is 1512, while the sum is 25.

The square root of 387331 is about 622.3592210291. The cubic root of 387331 is about 72.8943865897.

The spelling of 387331 in words is "three hundred eighty-seven thousand, three hundred thirty-one".