3722909 has 4 divisors (see below), whose sum is σ = 3726780. Its totient is φ = 3719040.

The previous prime is 3722899. The next prime is 3722911. The reversal of 3722909 is 9092273.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 9092273 = 1483 ⋅6131.

It can be written as a sum of positive squares in 2 ways, for example, as 2630884 + 1092025 = 1622^2 + 1045^2 .

It is a cyclic number.

It is not a de Polignac number, because 3722909 - 2⁴ = 3722893 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3722009) 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 in 3 ways as a sum of consecutive naturals, for example, 749 + ... + 2829.

It is an arithmetic number, because the mean of its divisors is an integer number (931695).

Almost surely, 2^3722909 is an apocalyptic number.

It is an amenable number.

3722909 is a deficient number, since it is larger than the sum of its proper divisors (3871).

3722909 is a wasteful number, since it uses less digits than its factorization.

3722909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3870.

The product of its (nonzero) digits is 6804, while the sum is 32.

The square root of 3722909 is about 1929.4841279472. The cubic root of 3722909 is about 154.9865961354.

The spelling of 3722909 in words is "three million, seven hundred twenty-two thousand, nine hundred nine".