3878197447 has 2 divisors, whose sum is σ = 3878197448. Its totient is φ = 3878197446.

The previous prime is 3878197441. The next prime is 3878197451. The reversal of 3878197447 is 7447918783.

3878197447 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 3878197447 - 2⁷ = 3878197319 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 3878197391 and 3878197400.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3878197441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1939098723 + 1939098724.

It is an arithmetic number, because the mean of its divisors is an integer number (1939098724).

Almost surely, 2^3878197447 is an apocalyptic number.

3878197447 is a deficient number, since it is larger than the sum of its proper divisors (1).

3878197447 is an equidigital number, since it uses as much as digits as its factorization.

3878197447 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 3878197447 is about 62275.1752064978. The cubic root of 3878197447 is about 1571.1222245486.

The spelling of 3878197447 in words is "three billion, eight hundred seventy-eight million, one hundred ninety-seven thousand, four hundred forty-seven".