387949 has 4 divisors (see below), whose sum is σ = 390880. Its totient is φ = 385020.

The previous prime is 387917. The next prime is 387953. The reversal of 387949 is 949783.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 949783 = 521 ⋅1823.

It is a cyclic number.

It is not a de Polignac number, because 387949 - 2⁵ = 387917 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 (387449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1257 + ... + 1534.

It is an arithmetic number, because the mean of its divisors is an integer number (97720).

2³⁸⁷⁹⁴⁹ is an apocalyptic number.

It is an amenable number.

387949 is a deficient number, since it is larger than the sum of its proper divisors (2931).

387949 is a wasteful number, since it uses less digits than its factorization.

387949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2930.

The product of its digits is 54432, while the sum is 40.

The square root of 387949 is about 622.8555209677. The cubic root of 387949 is about 72.9331344937.

The spelling of 387949 in words is "three hundred eighty-seven thousand, nine hundred forty-nine".