3878417749 has 2 divisors, whose sum is σ = 3878417750. Its totient is φ = 3878417748.

The previous prime is 3878417717. The next prime is 3878417789. The reversal of 3878417749 is 9477148783.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3409392100 + 469025649 = 58390^2 + 21657^2 .

It is an emirp because it is prime and its reverse (9477148783) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3878417749 - 2⁵ = 3878417717 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 3878417693 and 3878417702.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3878417789) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1939208874 + 1939208875.

It is an arithmetic number, because the mean of its divisors is an integer number (1939208875).

Almost surely, 2^3878417749 is an apocalyptic number.

It is an amenable number.

3878417749 is a deficient number, since it is larger than the sum of its proper divisors (1).

3878417749 is an equidigital number, since it uses as much as digits as its factorization.

3878417749 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9483264, while the sum is 58.

The square root of 3878417749 is about 62276.9439600242. The cubic root of 3878417749 is about 1571.1519733189.

The spelling of 3878417749 in words is "three billion, eight hundred seventy-eight million, four hundred seventeen thousand, seven hundred forty-nine".