138964271 has 8 divisors (see below), whose sum is σ = 146438400. Its totient is φ = 131506200.

The previous prime is 138964249. The next prime is 138964279. The reversal of 138964271 is 172469831.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-138964271 is a prime.

It is a super-2 number, since 2×138964271² = 38622137229122882, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138964279) 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, 16490 + ... + 23448.

It is an arithmetic number, because the mean of its divisors is an integer number (18304800).

Almost surely, 2^138964271 is an apocalyptic number.

138964271 is a deficient number, since it is larger than the sum of its proper divisors (7474129).

138964271 is a wasteful number, since it uses less digits than its factorization.

138964271 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8029.

The product of its digits is 72576, while the sum is 41.

The square root of 138964271 is about 11788.3107780547. The cubic root of 138964271 is about 517.9657592787.

The spelling of 138964271 in words is "one hundred thirty-eight million, nine hundred sixty-four thousand, two hundred seventy-one".