137685749 has 8 divisors (see below), whose sum is σ = 141644160. Its totient is φ = 133756000.

The previous prime is 137685733. The next prime is 137685809. The reversal of 137685749 is 947586731.

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 137685749 - 2⁴ = 137685733 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 137685697 and 137685706.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (137685949) 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, 2774 + ... + 16824.

It is an arithmetic number, because the mean of its divisors is an integer number (17705520).

Almost surely, 2^137685749 is an apocalyptic number.

It is an amenable number.

137685749 is a deficient number, since it is larger than the sum of its proper divisors (3958411).

137685749 is a wasteful number, since it uses less digits than its factorization.

137685749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14331.

The product of its digits is 1270080, while the sum is 50.

The square root of 137685749 is about 11733.9570904278. The cubic root of 137685749 is about 516.3723713294.

The spelling of 137685749 in words is "one hundred thirty-seven million, six hundred eighty-five thousand, seven hundred forty-nine".