3968397693 has 24 divisors (see below), whose sum is σ = 6180953688. Its totient is φ = 2438969472.

The previous prime is 3968397691. The next prime is 3968397721. The reversal of 3968397693 is 3967938693.

It can be written as a sum of positive squares in 4 ways, for example, as 1011430809 + 2956966884 = 31803^2 + 54378^2 .

It is not a de Polignac number, because 3968397693 - 2¹ = 3968397691 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 3968397693.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3968397691) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 71971 + ... + 114527.

It is an arithmetic number, because the mean of its divisors is an integer number (257539737).

Almost surely, 2^3968397693 is an apocalyptic number.

It is an amenable number.

3968397693 is a deficient number, since it is larger than the sum of its proper divisors (2212555995).

3968397693 is a wasteful number, since it uses less digits than its factorization.

3968397693 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43373 (or 43370 counting only the distinct ones).

The product of its digits is 39680928, while the sum is 63.

The square root of 3968397693 is about 62995.2196043478. The cubic root of 3968397693 is about 1583.2095327567.

The spelling of 3968397693 in words is "three billion, nine hundred sixty-eight million, three hundred ninety-seven thousand, six hundred ninety-three".