138732147 has 24 divisors (see below), whose sum is σ = 206606400. Its totient is φ = 89652528.

The previous prime is 138732131. The next prime is 138732163. The reversal of 138732147 is 741237831.

It is an interprime number because it is at equal distance from previous prime (138732131) and next prime (138732163).

It is not a de Polignac number, because 138732147 - 2⁴ = 138732131 is a prime.

It is a super-2 number, since 2×138732147² = 38493217222459218, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (138732127) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 52504 + ... + 55082.

It is an arithmetic number, because the mean of its divisors is an integer number (8608600).

Almost surely, 2^138732147 is an apocalyptic number.

138732147 is a deficient number, since it is larger than the sum of its proper divisors (67874253).

138732147 is a wasteful number, since it uses less digits than its factorization.

138732147 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2767 (or 2764 counting only the distinct ones).

The product of its digits is 28224, while the sum is 36.

The square root of 138732147 is about 11778.4611473656. The cubic root of 138732147 is about 517.6771975978.

Adding to 138732147 its reverse (741237831), we get a palindrome (879969978).

The spelling of 138732147 in words is "one hundred thirty-eight million, seven hundred thirty-two thousand, one hundred forty-seven".