131839487 has 4 divisors (see below), whose sum is σ = 141981000. Its totient is φ = 121697976.

The previous prime is 131839447. The next prime is 131839493. The reversal of 131839487 is 784938131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 784938131 = 12323 ⋅63697.

It is a cyclic number.

It is not a de Polignac number, because 131839487 - 2¹⁶ = 131773951 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 (131839417) 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, 5070737 + ... + 5070762.

It is an arithmetic number, because the mean of its divisors is an integer number (35495250).

Almost surely, 2^131839487 is an apocalyptic number.

131839487 is a deficient number, since it is larger than the sum of its proper divisors (10141513).

131839487 is a wasteful number, since it uses less digits than its factorization.

131839487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10141512.

The product of its digits is 145152, while the sum is 44.

The square root of 131839487 is about 11482.1377365019. The cubic root of 131839487 is about 508.9578706915.

The spelling of 131839487 in words is "one hundred thirty-one million, eight hundred thirty-nine thousand, four hundred eighty-seven".