387969 has 8 divisors (see below), whose sum is σ = 524160. Its totient is φ = 255216.

The previous prime is 387967. The next prime is 387971. The reversal of 387969 is 969783.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (387967) and next prime (387971).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 387969 - 2¹ = 387967 is a prime.

It is a super-2 number, since 2×387969² = 301039889922, which contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 387969.

It is not an unprimeable number, because it can be changed into a prime (387967) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 582 + ... + 1055.

It is an arithmetic number, because the mean of its divisors is an integer number (65520).

2³⁸⁷⁹⁶⁹ is an apocalyptic number.

It is an amenable number.

387969 is a deficient number, since it is larger than the sum of its proper divisors (136191).

387969 is a wasteful number, since it uses less digits than its factorization.

387969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1719.

The product of its digits is 81648, while the sum is 42.

The square root of 387969 is about 622.8715758485. The cubic root of 387969 is about 72.9343877835.

The spelling of 387969 in words is "three hundred eighty-seven thousand, nine hundred sixty-nine".