138303647 has 4 divisors (see below), whose sum is σ = 139970040. Its totient is φ = 136637256.

The previous prime is 138303637. The next prime is 138303661. The reversal of 138303647 is 746303831.

It is a happy number.

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

It is not a de Polignac number, because 138303647 - 2⁴ = 138303631 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 (138303637) 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, 833072 + ... + 833237.

It is an arithmetic number, because the mean of its divisors is an integer number (34992510).

Almost surely, 2^138303647 is an apocalyptic number.

138303647 is a deficient number, since it is larger than the sum of its proper divisors (1666393).

138303647 is an equidigital number, since it uses as much as digits as its factorization.

138303647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1666392.

The product of its (nonzero) digits is 36288, while the sum is 35.

The square root of 138303647 is about 11760.2570975298. The cubic root of 138303647 is about 517.1436671967.

The spelling of 138303647 in words is "one hundred thirty-eight million, three hundred three thousand, six hundred forty-seven".