138607379 has 2 divisors, whose sum is σ = 138607380. Its totient is φ = 138607378.

The previous prime is 138607369. The next prime is 138607423. The reversal of 138607379 is 973706831.

It is an a-pointer prime, because the next prime (138607423) can be obtained adding 138607379 to its sum of digits (44).

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-138607379 is a prime.

It is not a weakly prime, because it can be changed into another prime (138607319) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69303689 + 69303690.

It is an arithmetic number, because the mean of its divisors is an integer number (69303690).

Almost surely, 2^138607379 is an apocalyptic number.

138607379 is a deficient number, since it is larger than the sum of its proper divisors (1).

138607379 is an equidigital number, since it uses as much as digits as its factorization.

138607379 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 190512, while the sum is 44.

The square root of 138607379 is about 11773.1635085902. The cubic root of 138607379 is about 517.5219609964.

The spelling of 138607379 in words is "one hundred thirty-eight million, six hundred seven thousand, three hundred seventy-nine".