3940519657 has 2 divisors, whose sum is σ = 3940519658. Its totient is φ = 3940519656.

The previous prime is 3940519619. The next prime is 3940519711. The reversal of 3940519657 is 7569150493.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3462616336 + 477903321 = 58844^2 + 21861^2 .

It is a cyclic number.

It is not a de Polignac number, because 3940519657 - 2⁷ = 3940519529 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 3940519657.

It is not a weakly prime, because it can be changed into another prime (3940519357) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1970259828 + 1970259829.

It is an arithmetic number, because the mean of its divisors is an integer number (1970259829).

Almost surely, 2^3940519657 is an apocalyptic number.

It is an amenable number.

3940519657 is a deficient number, since it is larger than the sum of its proper divisors (1).

3940519657 is an equidigital number, since it uses as much as digits as its factorization.

3940519657 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1020600, while the sum is 49.

The square root of 3940519657 is about 62773.5585816194. The cubic root of 3940519657 is about 1579.4934627117.

The spelling of 3940519657 in words is "three billion, nine hundred forty million, five hundred nineteen thousand, six hundred fifty-seven".