138429337 has 2 divisors, whose sum is σ = 138429338. Its totient is φ = 138429336.

The previous prime is 138429331. The next prime is 138429359. The reversal of 138429337 is 733924831.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 134119561 + 4309776 = 11581^2 + 2076^2 .

It is an emirp because it is prime and its reverse (733924831) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 138429337 - 2³ = 138429329 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 138429337.

It is not a weakly prime, because it can be changed into another prime (138429331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69214668 + 69214669.

It is an arithmetic number, because the mean of its divisors is an integer number (69214669).

Almost surely, 2^138429337 is an apocalyptic number.

It is an amenable number.

138429337 is a deficient number, since it is larger than the sum of its proper divisors (1).

138429337 is an equidigital number, since it uses as much as digits as its factorization.

138429337 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 108864, while the sum is 40.

The square root of 138429337 is about 11765.5997297205. The cubic root of 138429337 is about 517.3002793765.

The spelling of 138429337 in words is "one hundred thirty-eight million, four hundred twenty-nine thousand, three hundred thirty-seven".