3923768309 has 2 divisors, whose sum is σ = 3923768310. Its totient is φ = 3923768308.

The previous prime is 3923768281. The next prime is 3923768357. The reversal of 3923768309 is 9038673293.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3520642225 + 403126084 = 59335^2 + 20078^2 .

It is a cyclic number.

It is not a de Polignac number, because 3923768309 - 2¹² = 3923764213 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3923762309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1961884154 + 1961884155.

It is an arithmetic number, because the mean of its divisors is an integer number (1961884155).

Almost surely, 2^3923768309 is an apocalyptic number.

It is an amenable number.

3923768309 is a deficient number, since it is larger than the sum of its proper divisors (1).

3923768309 is an equidigital number, since it uses as much as digits as its factorization.

3923768309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1469664, while the sum is 50.

The square root of 3923768309 is about 62639.9896950822. The cubic root of 3923768309 is about 1577.2521148604.

The spelling of 3923768309 in words is "three billion, nine hundred twenty-three million, seven hundred sixty-eight thousand, three hundred nine".