3939151849 has 2 divisors, whose sum is σ = 3939151850. Its totient is φ = 3939151848.

The previous prime is 3939151847. The next prime is 3939151859. The reversal of 3939151849 is 9481519393.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3521235600 + 417916249 = 59340^2 + 20443^2 .

It is a cyclic number.

It is not a de Polignac number, because 3939151849 - 2¹ = 3939151847 is a prime.

Together with 3939151847, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 3939151796 and 3939151805.

It is not a weakly prime, because it can be changed into another prime (3939151847) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1969575924 + 1969575925.

It is an arithmetic number, because the mean of its divisors is an integer number (1969575925).

Almost surely, 2^3939151849 is an apocalyptic number.

It is an amenable number.

3939151849 is a deficient number, since it is larger than the sum of its proper divisors (1).

3939151849 is an equidigital number, since it uses as much as digits as its factorization.

3939151849 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1049760, while the sum is 52.

The square root of 3939151849 is about 62762.6628577851. The cubic root of 3939151849 is about 1579.3106870033.

The spelling of 3939151849 in words is "three billion, nine hundred thirty-nine million, one hundred fifty-one thousand, eight hundred forty-nine".