137986871 has 8 divisors (see below), whose sum is σ = 154032384. Its totient is φ = 122524920.

The previous prime is 137986831. The next prime is 137986883. The reversal of 137986871 is 178689731.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-137986871 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (137986831) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 145391 + ... + 146336.

It is an arithmetic number, because the mean of its divisors is an integer number (19254048).

Almost surely, 2^137986871 is an apocalyptic number.

137986871 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

137986871 is a deficient number, since it is larger than the sum of its proper divisors (16045513).

137986871 is a wasteful number, since it uses less digits than its factorization.

137986871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 291781.

The product of its digits is 508032, while the sum is 50.

The square root of 137986871 is about 11746.7813038296. The cubic root of 137986871 is about 516.7485367777.

The spelling of 137986871 in words is "one hundred thirty-seven million, nine hundred eighty-six thousand, eight hundred seventy-one".