3944713651 has 2 divisors, whose sum is σ = 3944713652. Its totient is φ = 3944713650.

The previous prime is 3944713631. The next prime is 3944713679. The reversal of 3944713651 is 1563174493.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3944713651 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 3944713598 and 3944713607.

It is not a weakly prime, because it can be changed into another prime (3944713631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1972356825 + 1972356826.

It is an arithmetic number, because the mean of its divisors is an integer number (1972356826).

Almost surely, 2^3944713651 is an apocalyptic number.

3944713651 is a deficient number, since it is larger than the sum of its proper divisors (1).

3944713651 is an equidigital number, since it uses as much as digits as its factorization.

3944713651 is an evil number, because the sum of its binary digits is even.

The product of its digits is 272160, while the sum is 43.

The square root of 3944713651 is about 62806.9554348879. The cubic root of 3944713651 is about 1580.0536288746.

The spelling of 3944713651 in words is "three billion, nine hundred forty-four million, seven hundred thirteen thousand, six hundred fifty-one".