387661539 has 8 divisors (see below), whose sum is σ = 516979792. Its totient is φ = 258392160.

The previous prime is 387661517. The next prime is 387661559. The reversal of 387661539 is 935166783.

It is a happy number.

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

It is not a de Polignac number, because 387661539 - 2⁵ = 387661507 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (387661559) 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, 14877 + ... + 31569.

It is an arithmetic number, because the mean of its divisors is an integer number (64622474).

Almost surely, 2^387661539 is an apocalyptic number.

387661539 is a deficient number, since it is larger than the sum of its proper divisors (129318253).

387661539 is a wasteful number, since it uses less digits than its factorization.

387661539 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24437.

The product of its digits is 816480, while the sum is 48.

The square root of 387661539 is about 19689.1223522025. The cubic root of 387661539 is about 729.1511613545.

The spelling of 387661539 in words is "three hundred eighty-seven million, six hundred sixty-one thousand, five hundred thirty-nine".