138047465 has 8 divisors (see below), whose sum is σ = 165914568. Its totient is φ = 110266240.

The previous prime is 138047443. The next prime is 138047473. The reversal of 138047465 is 564740831.

It can be written as a sum of positive squares in 4 ways, for example, as 31214569 + 106832896 = 5587^2 + 10336^2 .

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

It is not a de Polignac number, because 138047465 - 2⁶ = 138047401 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17876 + ... + 24405.

It is an arithmetic number, because the mean of its divisors is an integer number (20739321).

Almost surely, 2^138047465 is an apocalyptic number.

It is an amenable number.

138047465 is a deficient number, since it is larger than the sum of its proper divisors (27867103).

138047465 is an equidigital number, since it uses as much as digits as its factorization.

138047465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42939.

The product of its (nonzero) digits is 80640, while the sum is 38.

The square root of 138047465 is about 11749.3601953468. The cubic root of 138047465 is about 516.8241654189.

The spelling of 138047465 in words is "one hundred thirty-eight million, forty-seven thousand, four hundred sixty-five".