3878447 has 2 divisors, whose sum is σ = 3878448. Its totient is φ = 3878446.

The previous prime is 3878423. The next prime is 3878449. The reversal of 3878447 is 7448783.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 3878447 - 2¹⁴ = 3862063 is a prime.

It is a super-3 number, since 3×3878447³ (a number of 21 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

Together with 3878449, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3878449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1939223 + 1939224.

It is an arithmetic number, because the mean of its divisors is an integer number (1939224).

Almost surely, 2^3878447 is an apocalyptic number.

3878447 is a deficient number, since it is larger than the sum of its proper divisors (1).

3878447 is an equidigital number, since it uses as much as digits as its factorization.

3878447 is an evil number, because the sum of its binary digits is even.

The product of its digits is 150528, while the sum is 41.

The square root of 3878447 is about 1969.3773127565. The cubic root of 3878447 is about 157.1155923181.

The spelling of 3878447 in words is "three million, eight hundred seventy-eight thousand, four hundred forty-seven".