39969773921899 has 8 divisors (see below), whose sum is σ = 40332847271840. Its totient is φ = 39607994952000.

The previous prime is 39969773921867. The next prime is 39969773921911. The reversal of 39969773921899 is 99812937796993.

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 39969773921899 - 2⁵ = 39969773921867 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (39969773921849) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 323532972 + ... + 323656489.

It is an arithmetic number, because the mean of its divisors is an integer number (5041605908980).

Almost surely, 2^{39969773921899} is an apocalyptic number.

39969773921899 is a deficient number, since it is larger than the sum of its proper divisors (363073349941).

39969773921899 is a wasteful number, since it uses less digits than its factorization.

39969773921899 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 647190021.

The product of its digits is 22499086176, while the sum is 91.

The spelling of 39969773921899 in words is "thirty-nine trillion, nine hundred sixty-nine billion, seven hundred seventy-three million, nine hundred twenty-one thousand, eight hundred ninety-nine".