39969873905 has 8 divisors (see below), whose sum is σ = 51653375592. Its totient is φ = 29516214528.

The previous prime is 39969873883. The next prime is 39969873943. The reversal of 39969873905 is 50937896993.

It can be written as a sum of positive squares in 4 ways, for example, as 62220544 + 39907653361 = 7888^2 + 199769^2 .

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 39969873905 - 2²⁰ = 39968825329 is a prime.

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, 307460504 + ... + 307460633.

It is an arithmetic number, because the mean of its divisors is an integer number (6456671949).

Almost surely, 2^39969873905 is an apocalyptic number.

It is an amenable number.

39969873905 is a deficient number, since it is larger than the sum of its proper divisors (11683501687).

39969873905 is a wasteful number, since it uses less digits than its factorization.

39969873905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 614921155.

The product of its (nonzero) digits is 99202320, while the sum is 68.

The spelling of 39969873905 in words is "thirty-nine billion, nine hundred sixty-nine million, eight hundred seventy-three thousand, nine hundred five".