387983521 has 8 divisors (see below), whose sum is σ = 394245504. Its totient is φ = 381769200.

The previous prime is 387983513. The next prime is 387983549. The reversal of 387983521 is 125389783.

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

It is a cyclic number.

It is not a de Polignac number, because 387983521 - 2³ = 387983513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (387983551) 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, 4680 + ... + 28246.

It is an arithmetic number, because the mean of its divisors is an integer number (49280688).

Almost surely, 2^387983521 is an apocalyptic number.

It is an amenable number.

387983521 is a deficient number, since it is larger than the sum of its proper divisors (6261983).

387983521 is a wasteful number, since it uses less digits than its factorization.

387983521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23831.

The product of its digits is 362880, while the sum is 46.

The square root of 387983521 is about 19697.2973019143. The cubic root of 387983521 is about 729.3529770765.

The spelling of 387983521 in words is "three hundred eighty-seven million, nine hundred eighty-three thousand, five hundred twenty-one".