138178273 has 8 divisors (see below), whose sum is σ = 144429696. Its totient is φ = 131947200.

The previous prime is 138178259. The next prime is 138178277. The reversal of 138178273 is 372871831.

138178273 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 138178273 - 2¹⁷ = 138047201 is a prime.

It is not an unprimeable number, because it can be changed into a prime (138178277) 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, 9753 + ... + 19273.

It is an arithmetic number, because the mean of its divisors is an integer number (18053712).

Almost surely, 2^138178273 is an apocalyptic number.

It is an amenable number.

138178273 is a deficient number, since it is larger than the sum of its proper divisors (6251423).

138178273 is an equidigital number, since it uses as much as digits as its factorization.

138178273 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10175.

The product of its digits is 56448, while the sum is 40.

The square root of 138178273 is about 11754.9254782836. The cubic root of 138178273 is about 516.9873542021.

The spelling of 138178273 in words is "one hundred thirty-eight million, one hundred seventy-eight thousand, two hundred seventy-three".