3945849619 has 2 divisors, whose sum is σ = 3945849620. Its totient is φ = 3945849618.

The previous prime is 3945849587. The next prime is 3945849623. The reversal of 3945849619 is 9169485493.

3945849619 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 3945849619 - 2⁵ = 3945849587 is a prime.

It is a super-2 number, since 2×3945849619² = 31139458431524890322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (3945849319) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1972924809 + 1972924810.

It is an arithmetic number, because the mean of its divisors is an integer number (1972924810).

Almost surely, 2^3945849619 is an apocalyptic number.

3945849619 is a deficient number, since it is larger than the sum of its proper divisors (1).

3945849619 is an equidigital number, since it uses as much as digits as its factorization.

3945849619 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8398080, while the sum is 58.

The square root of 3945849619 is about 62815.9981135379. The cubic root of 3945849619 is about 1580.2052848420.

The spelling of 3945849619 in words is "three billion, nine hundred forty-five million, eight hundred forty-nine thousand, six hundred nineteen".