3778399 has 2 divisors, whose sum is σ = 3778400. Its totient is φ = 3778398.

The previous prime is 3778391. The next prime is 3778421. The reversal of 3778399 is 9938773.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 3778399 - 2³ = 3778391 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3778391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1889199 + 1889200.

It is an arithmetic number, because the mean of its divisors is an integer number (1889200).

Almost surely, 2^3778399 is an apocalyptic number.

3778399 is a deficient number, since it is larger than the sum of its proper divisors (1).

3778399 is an equidigital number, since it uses as much as digits as its factorization.

3778399 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 285768, while the sum is 46.

The square root of 3778399 is about 1943.8104331441. The cubic root of 3778399 is about 155.7528274021.

The spelling of 3778399 in words is "three million, seven hundred seventy-eight thousand, three hundred ninety-nine".