138626463 has 8 divisors (see below), whose sum is σ = 185803776. Its totient is φ = 91933400.

The previous prime is 138626443. The next prime is 138626473. The reversal of 138626463 is 364626831.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 138626463 - 2⁵ = 138626431 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138626443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 120393 + ... + 121538.

It is an arithmetic number, because the mean of its divisors is an integer number (23225472).

Almost surely, 2^138626463 is an apocalyptic number.

138626463 is a deficient number, since it is larger than the sum of its proper divisors (47177313).

138626463 is a wasteful number, since it uses less digits than its factorization.

138626463 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 242125.

The product of its digits is 124416, while the sum is 39.

The square root of 138626463 is about 11773.9739680365. The cubic root of 138626463 is about 517.5457113814.

The spelling of 138626463 in words is "one hundred thirty-eight million, six hundred twenty-six thousand, four hundred sixty-three".