138804317 has 4 divisors (see below), whose sum is σ = 140705820. Its totient is φ = 136902816.

The previous prime is 138804313. The next prime is 138804319. The reversal of 138804317 is 713408831.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 73856836 + 64947481 = 8594^2 + 8059^2 .

It is a cyclic number.

It is not a de Polignac number, because 138804317 - 2² = 138804313 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138804313) 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, 950642 + ... + 950787.

It is an arithmetic number, because the mean of its divisors is an integer number (35176455).

Almost surely, 2^138804317 is an apocalyptic number.

It is an amenable number.

138804317 is a deficient number, since it is larger than the sum of its proper divisors (1901503).

138804317 is an equidigital number, since it uses as much as digits as its factorization.

138804317 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1901502.

The product of its (nonzero) digits is 16128, while the sum is 35.

The square root of 138804317 is about 11781.5243920301. The cubic root of 138804317 is about 517.7669491743.

The spelling of 138804317 in words is "one hundred thirty-eight million, eight hundred four thousand, three hundred seventeen".