137638749 has 8 divisors (see below), whose sum is σ = 194313600. Its totient is φ = 86361536.

The previous prime is 137638733. The next prime is 137638751. The reversal of 137638749 is 947836731.

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 137638749 - 2⁴ = 137638733 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 137638698 and 137638707.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (137638759) 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, 1349349 + ... + 1349450.

It is an arithmetic number, because the mean of its divisors is an integer number (24289200).

Almost surely, 2^137638749 is an apocalyptic number.

It is an amenable number.

137638749 is a deficient number, since it is larger than the sum of its proper divisors (56674851).

137638749 is a wasteful number, since it uses less digits than its factorization.

137638749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2698819.

The product of its digits is 762048, while the sum is 48.

The square root of 137638749 is about 11731.9541850452. The cubic root of 137638749 is about 516.3136088608.

The spelling of 137638749 in words is "one hundred thirty-seven million, six hundred thirty-eight thousand, seven hundred forty-nine".