138901559 has 2 divisors, whose sum is σ = 138901560. Its totient is φ = 138901558.

The previous prime is 138901549. The next prime is 138901573. The reversal of 138901559 is 955109831.

138901559 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-138901559 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (138901549) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69450779 + 69450780.

It is an arithmetic number, because the mean of its divisors is an integer number (69450780).

Almost surely, 2^138901559 is an apocalyptic number.

138901559 is a deficient number, since it is larger than the sum of its proper divisors (1).

138901559 is an equidigital number, since it uses as much as digits as its factorization.

138901559 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48600, while the sum is 41.

The square root of 138901559 is about 11785.6505548060. The cubic root of 138901559 is about 517.8878314392.

The spelling of 138901559 in words is "one hundred thirty-eight million, nine hundred one thousand, five hundred fifty-nine".