3778997 has 2 divisors, whose sum is σ = 3778998. Its totient is φ = 3778996.

The previous prime is 3778987. The next prime is 3779003. The reversal of 3778997 is 7998773.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3129361 + 649636 = 1769^2 + 806^2 .

It is an emirp because it is prime and its reverse (7998773) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3778997 - 2¹⁰ = 3777973 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3778987) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1889498 + 1889499.

It is an arithmetic number, because the mean of its divisors is an integer number (1889499).

Almost surely, 2^3778997 is an apocalyptic number.

It is an amenable number.

3778997 is a deficient number, since it is larger than the sum of its proper divisors (1).

3778997 is an equidigital number, since it uses as much as digits as its factorization.

3778997 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 666792, while the sum is 50.

The square root of 3778997 is about 1943.9642486424. The cubic root of 3778997 is about 155.7610438696.

The spelling of 3778997 in words is "three million, seven hundred seventy-eight thousand, nine hundred ninety-seven".