138530513 has 8 divisors (see below), whose sum is σ = 154810656. Its totient is φ = 122864800.

The previous prime is 138530507. The next prime is 138530519. The reversal of 138530513 is 315035831.

It is an interprime number because it is at equal distance from previous prime (138530507) and next prime (138530519).

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

It is a cyclic number.

It is not a de Polignac number, because 138530513 - 2²⁰ = 137481937 is a prime.

It is not an unprimeable number, because it can be changed into a prime (138530519) 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, 153131 + ... + 154032.

It is an arithmetic number, because the mean of its divisors is an integer number (19351332).

Almost surely, 2^138530513 is an apocalyptic number.

It is an amenable number.

138530513 is a deficient number, since it is larger than the sum of its proper divisors (16280143).

138530513 is a wasteful number, since it uses less digits than its factorization.

138530513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 307215.

The product of its (nonzero) digits is 5400, while the sum is 29.

The square root of 138530513 is about 11769.8985976940. The cubic root of 138530513 is about 517.4262777818.

The spelling of 138530513 in words is "one hundred thirty-eight million, five hundred thirty thousand, five hundred thirteen".