3969773643 has 16 divisors (see below), whose sum is σ = 5897074176. Its totient is φ = 2354732640.

The previous prime is 3969773609. The next prime is 3969773657. The reversal of 3969773643 is 3463779693.

It is not a de Polignac number, because 3969773643 - 2⁹ = 3969773131 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3969773443) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1278196 + ... + 1281297.

It is an arithmetic number, because the mean of its divisors is an integer number (368567136).

Almost surely, 2^3969773643 is an apocalyptic number.

3969773643 is a gapful number since it is divisible by the number (33) formed by its first and last digit.

3969773643 is a deficient number, since it is larger than the sum of its proper divisors (1927300533).

3969773643 is a wasteful number, since it uses less digits than its factorization.

3969773643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2559554.

The product of its digits is 15431472, while the sum is 57.

The square root of 3969773643 is about 63006.1397246332. The cubic root of 3969773643 is about 1583.3924920266.

The spelling of 3969773643 in words is "three billion, nine hundred sixty-nine million, seven hundred seventy-three thousand, six hundred forty-three".