3969511227 has 48 divisors (see below), whose sum is σ = 6449395680. Its totient is φ = 2331763200.

The previous prime is 3969511223. The next prime is 3969511261. The reversal of 3969511227 is 7221159693.

It is a happy number.

It is not a de Polignac number, because 3969511227 - 2² = 3969511223 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (3969511223) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 634149 + ... + 640377.

It is an arithmetic number, because the mean of its divisors is an integer number (134362410).

Almost surely, 2^3969511227 is an apocalyptic number.

3969511227 is a deficient number, since it is larger than the sum of its proper divisors (2479884453).

3969511227 is a wasteful number, since it uses less digits than its factorization.

3969511227 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6444 (or 6441 counting only the distinct ones).

The product of its digits is 204120, while the sum is 45.

The square root of 3969511227 is about 63004.0572264993. The cubic root of 3969511227 is about 1583.3576019869.

The spelling of 3969511227 in words is "three billion, nine hundred sixty-nine million, five hundred eleven thousand, two hundred twenty-seven".