3979785970399 has 4 divisors (see below), whose sum is σ = 3979826885800. Its totient is φ = 3979745055000.

The previous prime is 3979785970393. The next prime is 3979785970483. The reversal of 3979785970399 is 9930795879793.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3979785970399 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3979785970393) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20311449 + ... + 20506450.

It is an arithmetic number, because the mean of its divisors is an integer number (994956721450).

Almost surely, 2^{3979785970399} is an apocalyptic number.

3979785970399 is a deficient number, since it is larger than the sum of its proper divisors (40915401).

3979785970399 is an equidigital number, since it uses as much as digits as its factorization.

3979785970399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40915400.

The product of its (nonzero) digits is 7291370520, while the sum is 85.

The spelling of 3979785970399 in words is "three trillion, nine hundred seventy-nine billion, seven hundred eighty-five million, nine hundred seventy thousand, three hundred ninety-nine".