138734705 has 8 divisors (see below), whose sum is σ = 176274792. Its totient is φ = 104459008.

The previous prime is 138734699. The next prime is 138734731. The reversal of 138734705 is 507437831.

It can be written as a sum of positive squares in 4 ways, for example, as 75881521 + 62853184 = 8711^2 + 7928^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 138734705 - 2¹⁰ = 138733681 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, 816002 + ... + 816171.

It is an arithmetic number, because the mean of its divisors is an integer number (22034349).

Almost surely, 2^138734705 is an apocalyptic number.

It is an amenable number.

138734705 is a deficient number, since it is larger than the sum of its proper divisors (37540087).

138734705 is a wasteful number, since it uses less digits than its factorization.

138734705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1632195.

The product of its (nonzero) digits is 70560, while the sum is 38.

The square root of 138734705 is about 11778.5697349041. The cubic root of 138734705 is about 517.6803792928.

The spelling of 138734705 in words is "one hundred thirty-eight million, seven hundred thirty-four thousand, seven hundred five".