148600138 has 4 divisors (see below), whose sum is σ = 222900210. Its totient is φ = 74300068.

The previous prime is 148600117. The next prime is 148600139. The reversal of 148600138 is 831006841.

148600138 is nontrivially palindromic in base 15.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 831006841 = 7 ⋅118715263.

It can be written as a sum of positive squares in only one way, i.e., 140114569 + 8485569 = 11837^2 + 2913^2 .

It is a Smith number, since the sum of its digits (31) 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 (148600139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37150033 + ... + 37150036.

Almost surely, 2^148600138 is an apocalyptic number.

148600138 is a deficient number, since it is larger than the sum of its proper divisors (74300072).

148600138 is an equidigital number, since it uses as much as digits as its factorization.

148600138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74300071.

The product of its (nonzero) digits is 4608, while the sum is 31.

The square root of 148600138 is about 12190.1656264384. The cubic root of 148600138 is about 529.6712545372.

Adding to 148600138 its reverse (831006841), we get a palindrome (979606979).

The spelling of 148600138 in words is "one hundred forty-eight million, six hundred thousand, one hundred thirty-eight".