387931258487 has 4 divisors (see below), whose sum is σ = 387949041936. Its totient is φ = 387913475040.

The previous prime is 387931258469. The next prime is 387931258493. The reversal of 387931258487 is 784852139783.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 387931258487 - 2¹² = 387931254391 is a prime.

It is a super-2 number, since 2×387931258487² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (387931258087) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8858963 + ... + 8902644.

It is an arithmetic number, because the mean of its divisors is an integer number (96987260484).

Almost surely, 2^387931258487 is an apocalyptic number.

387931258487 is a deficient number, since it is larger than the sum of its proper divisors (17783449).

387931258487 is a wasteful number, since it uses less digits than its factorization.

387931258487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17783448.

The product of its digits is 81285120, while the sum is 65.

The spelling of 387931258487 in words is "three hundred eighty-seven billion, nine hundred thirty-one million, two hundred fifty-eight thousand, four hundred eighty-seven".