138867511 has 8 divisors (see below), whose sum is σ = 142275584. Its totient is φ = 135467640.

The previous prime is 138867499. The next prime is 138867529. The reversal of 138867511 is 115768831.

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-138867511 is a prime.

It is a super-2 number, since 2×138867511² = 38568371222670242, 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 (138867581) 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, 45256 + ... + 48226.

It is an arithmetic number, because the mean of its divisors is an integer number (17784448).

Almost surely, 2^138867511 is an apocalyptic number.

138867511 is a deficient number, since it is larger than the sum of its proper divisors (3408073).

138867511 is a wasteful number, since it uses less digits than its factorization.

138867511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4101.

The product of its digits is 40320, while the sum is 40.

The square root of 138867511 is about 11784.2059978600. The cubic root of 138867511 is about 517.8455125338.

The spelling of 138867511 in words is "one hundred thirty-eight million, eight hundred sixty-seven thousand, five hundred eleven".