138048513 has 4 divisors (see below), whose sum is σ = 184064688. Its totient is φ = 92032340.

The previous prime is 138048499. The next prime is 138048527. The reversal of 138048513 is 315840831.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 315840831 = 3 ⋅105280277.

It is an interprime number because it is at equal distance from previous prime (138048499) and next prime (138048527).

It is a cyclic number.

It is not a de Polignac number, because 138048513 - 2⁵ = 138048481 is a prime.

It is a super-2 number, since 2×138048513² = 38114783883022338, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (138048583) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23008083 + ... + 23008088.

It is an arithmetic number, because the mean of its divisors is an integer number (46016172).

Almost surely, 2^138048513 is an apocalyptic number.

It is an amenable number.

138048513 is a deficient number, since it is larger than the sum of its proper divisors (46016175).

138048513 is an equidigital number, since it uses as much as digits as its factorization.

138048513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46016174.

The product of its (nonzero) digits is 11520, while the sum is 33.

The square root of 138048513 is about 11749.4047934353. The cubic root of 138048513 is about 516.8254732549.

The spelling of 138048513 in words is "one hundred thirty-eight million, forty-eight thousand, five hundred thirteen".