387557 has 4 divisors (see below), whose sum is σ = 392940. Its totient is φ = 382176.

The previous prime is 387551. The next prime is 387577. The reversal of 387557 is 755783.

387557 is nontrivially palindromic in base 16.

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 75076 + 312481 = 274^2 + 559^2 .

It is a cyclic number.

It is not a de Polignac number, because 387557 - 2⁶ = 387493 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (387551) 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, 2582 + ... + 2727.

It is an arithmetic number, because the mean of its divisors is an integer number (98235).

2³⁸⁷⁵⁵⁷ is an apocalyptic number.

It is an amenable number.

387557 is a deficient number, since it is larger than the sum of its proper divisors (5383).

387557 is an equidigital number, since it uses as much as digits as its factorization.

387557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5382.

The product of its digits is 29400, while the sum is 35.

The square root of 387557 is about 622.5407617177. The cubic root of 387557 is about 72.9085613122.

The spelling of 387557 in words is "three hundred eighty-seven thousand, five hundred fifty-seven".