138848407 has 2 divisors, whose sum is σ = 138848408. Its totient is φ = 138848406.

The previous prime is 138848399. The next prime is 138848441. The reversal of 138848407 is 704848831.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 138848407 - 2³ = 138848399 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (138848467) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69424203 + 69424204.

It is an arithmetic number, because the mean of its divisors is an integer number (69424204).

Almost surely, 2^138848407 is an apocalyptic number.

138848407 is a deficient number, since it is larger than the sum of its proper divisors (1).

138848407 is an equidigital number, since it uses as much as digits as its factorization.

138848407 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 172032, while the sum is 43.

The square root of 138848407 is about 11783.3953935188. The cubic root of 138848407 is about 517.8217647800.

The spelling of 138848407 in words is "one hundred thirty-eight million, eight hundred forty-eight thousand, four hundred seven".