138530379 has 16 divisors (see below), whose sum is σ = 199136000. Its totient is φ = 85154976.

The previous prime is 138530377. The next prime is 138530423. The reversal of 138530379 is 973035831.

It is not a de Polignac number, because 138530379 - 2¹ = 138530377 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (138530377) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 53292 + ... + 55830.

It is an arithmetic number, because the mean of its divisors is an integer number (12446000).

Almost surely, 2^138530379 is an apocalyptic number.

138530379 is a deficient number, since it is larger than the sum of its proper divisors (60605621).

138530379 is a wasteful number, since it uses less digits than its factorization.

138530379 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3954.

The product of its (nonzero) digits is 68040, while the sum is 39.

The square root of 138530379 is about 11769.8929052052. The cubic root of 138530379 is about 517.4261109470.

The spelling of 138530379 in words is "one hundred thirty-eight million, five hundred thirty thousand, three hundred seventy-nine".