138732745 has 8 divisors (see below), whose sum is σ = 167477184. Its totient is φ = 110320944.

The previous prime is 138732743. The next prime is 138732787. The reversal of 138732745 is 547237831.

It is a happy number.

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 138732745 - 2¹ = 138732743 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 138732698 and 138732707.

It is not an unprimeable number, because it can be changed into a prime (138732743) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 82239 + ... + 83908.

It is an arithmetic number, because the mean of its divisors is an integer number (20934648).

Almost surely, 2^138732745 is an apocalyptic number.

It is an amenable number.

138732745 is a deficient number, since it is larger than the sum of its proper divisors (28744439).

138732745 is a wasteful number, since it uses less digits than its factorization.

138732745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 166319.

The product of its digits is 141120, while the sum is 40.

The square root of 138732745 is about 11778.4865326578. The cubic root of 138732745 is about 517.6779414064.

The spelling of 138732745 in words is "one hundred thirty-eight million, seven hundred thirty-two thousand, seven hundred forty-five".