387118131 has 4 divisors (see below), whose sum is σ = 516157512. Its totient is φ = 258078752.

The previous prime is 387118117. The next prime is 387118159. The reversal of 387118131 is 131811783.

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 387118131 - 2¹¹ = 387116083 is a prime.

It is a super-2 number, since 2×387118131² = 299720894697866322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 387118092 and 387118101.

It is not an unprimeable number, because it can be changed into a prime (387118031) 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, 64519686 + ... + 64519691.

It is an arithmetic number, because the mean of its divisors is an integer number (129039378).

Almost surely, 2^387118131 is an apocalyptic number.

387118131 is a deficient number, since it is larger than the sum of its proper divisors (129039381).

387118131 is a wasteful number, since it uses less digits than its factorization.

387118131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129039380.

The product of its digits is 4032, while the sum is 33.

The square root of 387118131 is about 19675.3178119186. The cubic root of 387118131 is about 728.8103040027.

The spelling of 387118131 in words is "three hundred eighty-seven million, one hundred eighteen thousand, one hundred thirty-one".