3996641951 has 2 divisors, whose sum is σ = 3996641952. Its totient is φ = 3996641950.

The previous prime is 3996641917. The next prime is 3996642007. The reversal of 3996641951 is 1591466993.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 3996641951 - 2²⁶ = 3929533087 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 3996641893 and 3996641902.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3996671951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1998320975 + 1998320976.

It is an arithmetic number, because the mean of its divisors is an integer number (1998320976).

Almost surely, 2^3996641951 is an apocalyptic number.

3996641951 is a deficient number, since it is larger than the sum of its proper divisors (1).

3996641951 is an equidigital number, since it uses as much as digits as its factorization.

3996641951 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1574640, while the sum is 53.

The square root of 3996641951 is about 63218.9999209099. Note that the first 4 decimals coincide. The cubic root of 3996641951 is about 1586.9567133928.

The spelling of 3996641951 in words is "three billion, nine hundred ninety-six million, six hundred forty-one thousand, nine hundred fifty-one".