39938539705 has 8 divisors (see below), whose sum is σ = 50745438792. Its totient is φ = 30071371008.

The previous prime is 39938539687. The next prime is 39938539747. The reversal of 39938539705 is 50793583993.

It can be written as a sum of positive squares in 4 ways, for example, as 11284175529 + 28654364176 = 106227^2 + 169276^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-39938539705 is a prime.

It is a super-2 number, since 2×39938539705² (a number of 22 digits) contains 22 as substring.

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, 234932502 + ... + 234932671.

It is an arithmetic number, because the mean of its divisors is an integer number (6343179849).

Almost surely, 2^39938539705 is an apocalyptic number.

It is an amenable number.

39938539705 is a deficient number, since it is larger than the sum of its proper divisors (10806899087).

39938539705 is a wasteful number, since it uses less digits than its factorization.

39938539705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 469865195.

The product of its (nonzero) digits is 27556200, while the sum is 61.

The spelling of 39938539705 in words is "thirty-nine billion, nine hundred thirty-eight million, five hundred thirty-nine thousand, seven hundred five".