387391128767 has 4 divisors (see below), whose sum is σ = 387415473720. Its totient is φ = 387366783816.

The previous prime is 387391128703. The next prime is 387391128781. The reversal of 387391128767 is 767821193783.

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 387391128767 - 2⁶ = 387391128703 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 (387391028767) 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, 12148592 + ... + 12180437.

It is an arithmetic number, because the mean of its divisors is an integer number (96853868430).

Almost surely, 2^387391128767 is an apocalyptic number.

387391128767 is a deficient number, since it is larger than the sum of its proper divisors (24344953).

387391128767 is a wasteful number, since it uses less digits than its factorization.

387391128767 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24344952.

The product of its digits is 21337344, while the sum is 62.

The spelling of 387391128767 in words is "three hundred eighty-seven billion, three hundred ninety-one million, one hundred twenty-eight thousand, seven hundred sixty-seven".