138033473 has 8 divisors (see below), whose sum is σ = 138982536. Its totient is φ = 137088000.

The previous prime is 138033463. The next prime is 138033487. The reversal of 138033473 is 374330831.

It can be written as a sum of positive squares in 4 ways, for example, as 53246209 + 84787264 = 7297^2 + 9208^2 .

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 138033473 - 2⁶ = 138033409 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (138033463) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 144365 + ... + 145317.

It is an arithmetic number, because the mean of its divisors is an integer number (17372817).

Almost surely, 2^138033473 is an apocalyptic number.

It is an amenable number.

138033473 is a deficient number, since it is larger than the sum of its proper divisors (949063).

138033473 is an equidigital number, since it uses as much as digits as its factorization.

138033473 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1795.

The product of its (nonzero) digits is 18144, while the sum is 32.

The square root of 138033473 is about 11748.7647435805. The cubic root of 138033473 is about 516.8067036759.

The spelling of 138033473 in words is "one hundred thirty-eight million, thirty-three thousand, four hundred seventy-three".