387913 has 2 divisors, whose sum is σ = 387914. Its totient is φ = 387912.

The previous prime is 387911. The next prime is 387917. The reversal of 387913 is 319783.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 238144 + 149769 = 488^2 + 387^2 .

It is a cyclic number.

It is not a de Polignac number, because 387913 - 2¹ = 387911 is a prime.

Together with 387911, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (387911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 193956 + 193957.

It is an arithmetic number, because the mean of its divisors is an integer number (193957).

2³⁸⁷⁹¹³ is an apocalyptic number.

It is an amenable number.

387913 is a deficient number, since it is larger than the sum of its proper divisors (1).

387913 is an equidigital number, since it uses as much as digits as its factorization.

387913 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4536, while the sum is 31.

The square root of 387913 is about 622.8266211395. The cubic root of 387913 is about 72.9308784634.

The spelling of 387913 in words is "three hundred eighty-seven thousand, nine hundred thirteen".