137668287 has 8 divisors (see below), whose sum is σ = 184657536. Its totient is φ = 91228952.

The previous prime is 137668259. The next prime is 137668313. The reversal of 137668287 is 782866731.

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

It is a cyclic number.

It is not a de Polignac number, because 137668287 - 2¹⁹ = 137143999 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (137668247) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 136893 + ... + 137894.

It is an arithmetic number, because the mean of its divisors is an integer number (23082192).

Almost surely, 2^137668287 is an apocalyptic number.

137668287 is a deficient number, since it is larger than the sum of its proper divisors (46989249).

137668287 is a wasteful number, since it uses less digits than its factorization.

137668287 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 274957.

The product of its digits is 677376, while the sum is 48.

The square root of 137668287 is about 11733.2129870722. The cubic root of 137668287 is about 516.3505407584.

The spelling of 137668287 in words is "one hundred thirty-seven million, six hundred sixty-eight thousand, two hundred eighty-seven".