137717887 has 8 divisors (see below), whose sum is σ = 138700800. Its totient is φ = 136738680.

The previous prime is 137717857. The next prime is 137717891. The reversal of 137717887 is 788717731.

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-137717887 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 137717887.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (137717807) 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, 133062 + ... + 134092.

It is an arithmetic number, because the mean of its divisors is an integer number (17337600).

Almost surely, 2^137717887 is an apocalyptic number.

137717887 is a deficient number, since it is larger than the sum of its proper divisors (982913).

137717887 is a wasteful number, since it uses less digits than its factorization.

137717887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1853.

The product of its digits is 460992, while the sum is 49.

The square root of 137717887 is about 11735.3264547690. The cubic root of 137717887 is about 516.4125446574.

The spelling of 137717887 in words is "one hundred thirty-seven million, seven hundred seventeen thousand, eight hundred eighty-seven".