138294537 has 8 divisors (see below), whose sum is σ = 185497536. Its totient is φ = 91643952.

The previous prime is 138294509. The next prime is 138294551. The reversal of 138294537 is 735492831.

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

It is not a de Polignac number, because 138294537 - 2¹⁰ = 138293513 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (138494537) 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, 137518 + ... + 138519.

It is an arithmetic number, because the mean of its divisors is an integer number (23187192).

Almost surely, 2^138294537 is an apocalyptic number.

It is an amenable number.

138294537 is a deficient number, since it is larger than the sum of its proper divisors (47202999).

138294537 is a wasteful number, since it uses less digits than its factorization.

138294537 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 276207.

The product of its digits is 181440, while the sum is 42.

The square root of 138294537 is about 11759.8697696871. The cubic root of 138294537 is about 517.1323122725.

It can be divided in two parts, 138294 and 537, that added together give a palindrome (138831).

The spelling of 138294537 in words is "one hundred thirty-eight million, two hundred ninety-four thousand, five hundred thirty-seven".