138210467 has 4 divisors (see below), whose sum is σ = 141581496. Its totient is φ = 134839440.

The previous prime is 138210461. The next prime is 138210487. The reversal of 138210467 is 764012831.

138210467 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: 764012831 = 14923 ⋅51197.

It is a cyclic number.

It is not a de Polignac number, because 138210467 - 2⁶ = 138210403 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (138210461) 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, 1685453 + ... + 1685534.

It is an arithmetic number, because the mean of its divisors is an integer number (35395374).

Almost surely, 2^138210467 is an apocalyptic number.

138210467 is a deficient number, since it is larger than the sum of its proper divisors (3371029).

138210467 is an equidigital number, since it uses as much as digits as its factorization.

138210467 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3371028.

The product of its (nonzero) digits is 8064, while the sum is 32.

The square root of 138210467 is about 11756.2947819455. The cubic root of 138210467 is about 517.0275018512.

The spelling of 138210467 in words is "one hundred thirty-eight million, two hundred ten thousand, four hundred sixty-seven".