138124867 has 4 divisors (see below), whose sum is σ = 144130320. Its totient is φ = 132119416.

The previous prime is 138124853. The next prime is 138124969. The reversal of 138124867 is 768421831.

138124867 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 768421831 = 31 ⋅24787801.

It is a cyclic number.

It is not a de Polignac number, because 138124867 - 2⁷ = 138124739 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (138124807) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3002692 + ... + 3002737.

It is an arithmetic number, because the mean of its divisors is an integer number (36032580).

Almost surely, 2^138124867 is an apocalyptic number.

138124867 is a deficient number, since it is larger than the sum of its proper divisors (6005453).

138124867 is an equidigital number, since it uses as much as digits as its factorization.

138124867 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6005452.

The product of its digits is 64512, while the sum is 40.

The square root of 138124867 is about 11752.6536152479. The cubic root of 138124867 is about 516.9207402935.

The spelling of 138124867 in words is "one hundred thirty-eight million, one hundred twenty-four thousand, eight hundred sixty-seven".