3911985479 has 4 divisors (see below), whose sum is σ = 4046881560. Its totient is φ = 3777089400.

The previous prime is 3911985463. The next prime is 3911985503. The reversal of 3911985479 is 9745891193.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9745891193 = 19583 ⋅497671.

It is a cyclic number.

It is not a de Polignac number, because 3911985479 - 2⁴ = 3911985463 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3911985419) 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, 67447997 + ... + 67448054.

It is an arithmetic number, because the mean of its divisors is an integer number (1011720390).

Almost surely, 2^3911985479 is an apocalyptic number.

3911985479 is a deficient number, since it is larger than the sum of its proper divisors (134896081).

3911985479 is a wasteful number, since it uses less digits than its factorization.

3911985479 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134896080.

The product of its digits is 2449440, while the sum is 56.

The square root of 3911985479 is about 62545.8670017452. The cubic root of 3911985479 is about 1575.6717355024.

The spelling of 3911985479 in words is "three billion, nine hundred eleven million, nine hundred eighty-five thousand, four hundred seventy-nine".