138964463 has 8 divisors (see below), whose sum is σ = 154458576. Its totient is φ = 123947200.

The previous prime is 138964453. The next prime is 138964481. The reversal of 138964463 is 364469831.

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 138964463 - 2⁴ = 138964447 is a prime.

It is a super-3 number, since 3×138964463³ (a number of 25 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138964453) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 118598 + ... + 119763.

It is an arithmetic number, because the mean of its divisors is an integer number (19307322).

Almost surely, 2^138964463 is an apocalyptic number.

138964463 is a deficient number, since it is larger than the sum of its proper divisors (15494113).

138964463 is a wasteful number, since it uses less digits than its factorization.

138964463 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 238425.

The product of its digits is 373248, while the sum is 44.

The square root of 138964463 is about 11788.3189217123. The cubic root of 138964463 is about 517.9659978277.

The spelling of 138964463 in words is "one hundred thirty-eight million, nine hundred sixty-four thousand, four hundred sixty-three".