3720869 has 2 divisors, whose sum is σ = 3720870. Its totient is φ = 3720868.

The previous prime is 3720859. The next prime is 3720877. The reversal of 3720869 is 9680273.

3720869 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 can be written as a sum of positive squares in only one way, i.e., 3104644 + 616225 = 1762^2 + 785^2 .

It is a cyclic number.

It is not a de Polignac number, because 3720869 - 2⁴ = 3720853 is a prime.

It is a super-2 number, since 2×3720869² = 27689732230322, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3720839) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1860434 + 1860435.

It is an arithmetic number, because the mean of its divisors is an integer number (1860435).

Almost surely, 2^3720869 is an apocalyptic number.

It is an amenable number.

3720869 is a deficient number, since it is larger than the sum of its proper divisors (1).

3720869 is an equidigital number, since it uses as much as digits as its factorization.

3720869 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18144, while the sum is 35.

The square root of 3720869 is about 1928.9554167995. The cubic root of 3720869 is about 154.9582822171.

The spelling of 3720869 in words is "three million, seven hundred twenty thousand, eight hundred sixty-nine".