39960969217 has 16 divisors (see below), whose sum is σ = 43856064000. Its totient is φ = 36185808384.

The previous prime is 39960969211. The next prime is 39960969313. The reversal of 39960969217 is 71296906993.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-39960969217 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (39960969211) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 313009 + ... + 421777.

It is an arithmetic number, because the mean of its divisors is an integer number (2741004000).

It is a Proth number, since it is equal to 152439 ⋅ 2¹⁸ + 1 and 152439 < 2¹⁸.

Almost surely, 2^39960969217 is an apocalyptic number.

It is an amenable number.

39960969217 is a deficient number, since it is larger than the sum of its proper divisors (3895094783).

39960969217 is a wasteful number, since it uses less digits than its factorization.

39960969217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109320.

The product of its (nonzero) digits is 9920232, while the sum is 61.

The spelling of 39960969217 in words is "thirty-nine billion, nine hundred sixty million, nine hundred sixty-nine thousand, two hundred seventeen".