3921436723 has 2 divisors, whose sum is σ = 3921436724. Its totient is φ = 3921436722.

The previous prime is 3921436709. The next prime is 3921436777. The reversal of 3921436723 is 3276341293.

3921436723 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 3921436723 - 2¹⁷ = 3921305651 is a prime.

It is not a weakly prime, because it can be changed into another prime (3921436793) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1960718361 + 1960718362.

It is an arithmetic number, because the mean of its divisors is an integer number (1960718362).

Almost surely, 2^3921436723 is an apocalyptic number.

3921436723 is a deficient number, since it is larger than the sum of its proper divisors (1).

3921436723 is an equidigital number, since it uses as much as digits as its factorization.

3921436723 is an evil number, because the sum of its binary digits is even.

The product of its digits is 163296, while the sum is 40.

The square root of 3921436723 is about 62621.3759270746. The cubic root of 3921436723 is about 1576.9396407864.

The spelling of 3921436723 in words is "three billion, nine hundred twenty-one million, four hundred thirty-six thousand, seven hundred twenty-three".