138303591 has 8 divisors (see below), whose sum is σ = 184485360. Its totient is φ = 92162112.

The previous prime is 138303587. The next prime is 138303593. The reversal of 138303591 is 195303831.

138303591 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 not a de Polignac number, because 138303591 - 2² = 138303587 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138303593) 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, 856 + ... + 16653.

It is an arithmetic number, because the mean of its divisors is an integer number (23060670).

Almost surely, 2^138303591 is an apocalyptic number.

138303591 is a deficient number, since it is larger than the sum of its proper divisors (46181769).

138303591 is a wasteful number, since it uses less digits than its factorization.

138303591 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20145.

The product of its (nonzero) digits is 9720, while the sum is 33.

The square root of 138303591 is about 11760.2547166292. The cubic root of 138303591 is about 517.1435973984.

The spelling of 138303591 in words is "one hundred thirty-eight million, three hundred three thousand, five hundred ninety-one".