138907463 has 2 divisors, whose sum is σ = 138907464. Its totient is φ = 138907462.

The previous prime is 138907441. The next prime is 138907469. The reversal of 138907463 is 364709831.

138907463 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is an emirp because it is prime and its reverse (364709831) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 138907463 - 2⁶ = 138907399 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 138907463.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (138907469) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69453731 + 69453732.

It is an arithmetic number, because the mean of its divisors is an integer number (69453732).

Almost surely, 2^138907463 is an apocalyptic number.

138907463 is a deficient number, since it is larger than the sum of its proper divisors (1).

138907463 is an equidigital number, since it uses as much as digits as its factorization.

138907463 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 138907463 is about 11785.9010262262. The cubic root of 138907463 is about 517.8951689293.

The spelling of 138907463 in words is "one hundred thirty-eight million, nine hundred seven thousand, four hundred sixty-three".