3720931993 has 2 divisors, whose sum is σ = 3720931994. Its totient is φ = 3720931992.

The previous prime is 3720931901. The next prime is 3720932021. The reversal of 3720931993 is 3991390273.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3719414169 + 1517824 = 60987^2 + 1232^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3720931993 is a prime.

It is not a weakly prime, because it can be changed into another prime (3720931493) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1860465996 + 1860465997.

It is an arithmetic number, because the mean of its divisors is an integer number (1860465997).

Almost surely, 2^3720931993 is an apocalyptic number.

It is an amenable number.

3720931993 is a deficient number, since it is larger than the sum of its proper divisors (1).

3720931993 is an equidigital number, since it uses as much as digits as its factorization.

3720931993 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 275562, while the sum is 46.

The square root of 3720931993 is about 60999.4425630268. The cubic root of 3720931993 is about 1549.5915667521.

The spelling of 3720931993 in words is "three billion, seven hundred twenty million, nine hundred thirty-one thousand, nine hundred ninety-three".