138821430467 has 4 divisors (see below), whose sum is σ = 139001019120. Its totient is φ = 138641841816.

The previous prime is 138821430431. The next prime is 138821430547. The reversal of 138821430467 is 764034128831.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 764034128831 = 809 ⋅944417959.

It is a cyclic number.

It is not a de Polignac number, because 138821430467 - 2⁶ = 138821430403 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (138821430067) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 89793167 + ... + 89794712.

It is an arithmetic number, because the mean of its divisors is an integer number (34750254780).

Almost surely, 2^138821430467 is an apocalyptic number.

138821430467 is a deficient number, since it is larger than the sum of its proper divisors (179588653).

138821430467 is an equidigital number, since it uses as much as digits as its factorization.

138821430467 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 179588652.

The product of its (nonzero) digits is 774144, while the sum is 47.

The spelling of 138821430467 in words is "one hundred thirty-eight billion, eight hundred twenty-one million, four hundred thirty thousand, four hundred sixty-seven".