138534027 has 8 divisors (see below), whose sum is σ = 184773264. Its totient is φ = 92325408.

The previous prime is 138534023. The next prime is 138534029. The reversal of 138534027 is 720435831.

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

It is not a de Polignac number, because 138534027 - 2² = 138534023 is a prime.

It is not an unprimeable number, because it can be changed into a prime (138534023) 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, 6813 + ... + 17985.

It is an arithmetic number, because the mean of its divisors is an integer number (23096658).

Almost surely, 2^138534027 is an apocalyptic number.

138534027 is a deficient number, since it is larger than the sum of its proper divisors (46239237).

138534027 is a wasteful number, since it uses less digits than its factorization.

138534027 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15309.

The product of its (nonzero) digits is 20160, while the sum is 33.

The square root of 138534027 is about 11770.0478758584. The cubic root of 138534027 is about 517.4306528001.

Adding to 138534027 its reverse (720435831), we get a palindrome (858969858).

The spelling of 138534027 in words is "one hundred thirty-eight million, five hundred thirty-four thousand, twenty-seven".