3973989941 has 2 divisors, whose sum is σ = 3973989942. Its totient is φ = 3973989940.

The previous prime is 3973989937. The next prime is 3973989959. The reversal of 3973989941 is 1499893793.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3934927441 + 39062500 = 62729^2 + 6250^2 .

It is a cyclic number.

It is not a de Polignac number, because 3973989941 - 2² = 3973989937 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3973389941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1986994970 + 1986994971.

It is an arithmetic number, because the mean of its divisors is an integer number (1986994971).

Almost surely, 2^3973989941 is an apocalyptic number.

It is an amenable number.

3973989941 is a deficient number, since it is larger than the sum of its proper divisors (1).

3973989941 is an equidigital number, since it uses as much as digits as its factorization.

3973989941 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13226976, while the sum is 62.

The square root of 3973989941 is about 63039.5902667522. The cubic root of 3973989941 is about 1583.9528675916.

The spelling of 3973989941 in words is "three billion, nine hundred seventy-three million, nine hundred eighty-nine thousand, nine hundred forty-one".