3771989 has 8 divisors (see below), whose sum is σ = 4081560. Its totient is φ = 3465216.

The previous prime is 3771979. The next prime is 3771991. The reversal of 3771989 is 9891773.

It can be written as a sum of positive squares in 4 ways, for example, as 293764 + 3478225 = 542^2 + 1865^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 3771989 - 2⁴ = 3771973 is a prime.

It is a super-2 number, since 2×3771989² = 28455802032242, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3771949) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2777 + ... + 3905.

It is an arithmetic number, because the mean of its divisors is an integer number (510195).

Almost surely, 2^3771989 is an apocalyptic number.

It is an amenable number.

3771989 is a deficient number, since it is larger than the sum of its proper divisors (309571).

3771989 is a wasteful number, since it uses less digits than its factorization.

3771989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1399.

The product of its digits is 95256, while the sum is 44.

The square root of 3771989 is about 1942.1609099145. The cubic root of 3771989 is about 155.6647000645.

The spelling of 3771989 in words is "three million, seven hundred seventy-one thousand, nine hundred eighty-nine".