3911989823 has 12 divisors (see below), whose sum is σ = 4551807960. Its totient is φ = 3352304592.

The previous prime is 3911989817. The next prime is 3911989831. The reversal of 3911989823 is 3289891193.

It is not a de Polignac number, because 3911989823 - 2¹⁸ = 3911727679 is a prime.

It is a super-3 number, since 3×3911989823³ (a number of 30 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3911989813) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 270740 + ... + 284822.

It is an arithmetic number, because the mean of its divisors is an integer number (379317330).

Almost surely, 2^3911989823 is an apocalyptic number.

3911989823 is a deficient number, since it is larger than the sum of its proper divisors (639818137).

3911989823 is a wasteful number, since it uses less digits than its factorization.

3911989823 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19766 (or 19759 counting only the distinct ones).

The product of its digits is 839808, while the sum is 53.

The square root of 3911989823 is about 62545.9017282507. The cubic root of 3911989823 is about 1575.6723187284.

The spelling of 3911989823 in words is "three billion, nine hundred eleven million, nine hundred eighty-nine thousand, eight hundred twenty-three".