3878269 has 2 divisors, whose sum is σ = 3878270. Its totient is φ = 3878268.

The previous prime is 3878267. The next prime is 3878279. The reversal of 3878269 is 9628783.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2088025 + 1790244 = 1445^2 + 1338^2 .

It is a cyclic number.

It is not a de Polignac number, because 3878269 - 2¹ = 3878267 is a prime.

It is a super-2 number, since 2×3878269² = 30081940872722, which contains 22 as substring.

Together with 3878267, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3878263) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1939134 + 1939135.

It is an arithmetic number, because the mean of its divisors is an integer number (1939135).

Almost surely, 2^3878269 is an apocalyptic number.

It is an amenable number.

3878269 is a deficient number, since it is larger than the sum of its proper divisors (1).

3878269 is an equidigital number, since it uses as much as digits as its factorization.

3878269 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 145152, while the sum is 43.

The square root of 3878269 is about 1969.3321202885. The cubic root of 3878269 is about 157.1131886926.

The spelling of 3878269 in words is "three million, eight hundred seventy-eight thousand, two hundred sixty-nine".