138764903 has 2 divisors, whose sum is σ = 138764904. Its totient is φ = 138764902.

The previous prime is 138764893. The next prime is 138764929. The reversal of 138764903 is 309467831.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 138764903 - 2⁴ = 138764887 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (138764993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69382451 + 69382452.

It is an arithmetic number, because the mean of its divisors is an integer number (69382452).

Almost surely, 2^138764903 is an apocalyptic number.

138764903 is a deficient number, since it is larger than the sum of its proper divisors (1).

138764903 is an equidigital number, since it uses as much as digits as its factorization.

138764903 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108864, while the sum is 41.

The square root of 138764903 is about 11779.8515695233. The cubic root of 138764903 is about 517.7179372539.

The spelling of 138764903 in words is "one hundred thirty-eight million, seven hundred sixty-four thousand, nine hundred three".