138304761 has 8 divisors (see below), whose sum is σ = 210750144. Its totient is φ = 79031280.

The previous prime is 138304739. The next prime is 138304763. The reversal of 138304761 is 167403831.

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

It is not a de Polignac number, because 138304761 - 2⁶ = 138304697 is a prime.

It is not an unprimeable number, because it can be changed into a prime (138304763) 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, 3292950 + ... + 3292991.

It is an arithmetic number, because the mean of its divisors is an integer number (26343768).

Almost surely, 2^138304761 is an apocalyptic number.

It is an amenable number.

138304761 is a deficient number, since it is larger than the sum of its proper divisors (72445383).

138304761 is an equidigital number, since it uses as much as digits as its factorization.

138304761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6585951.

The product of its (nonzero) digits is 12096, while the sum is 33.

The square root of 138304761 is about 11760.3044603446. The cubic root of 138304761 is about 517.1450556790.

The spelling of 138304761 in words is "one hundred thirty-eight million, three hundred four thousand, seven hundred sixty-one".