3719665 has 4 divisors (see below), whose sum is σ = 4463604. Its totient is φ = 2975728.

The previous prime is 3719663. The next prime is 3719669. The reversal of 3719665 is 5669173.

3719665 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5669173 = 757 ⋅7489.

It can be written as a sum of positive squares in 2 ways, for example, as 2241009 + 1478656 = 1497^2 + 1216^2 .

It is a cyclic number.

It is not a de Polignac number, because 3719665 - 2¹ = 3719663 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3719663) 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 in 3 ways as a sum of consecutive naturals, for example, 371962 + ... + 371971.

It is an arithmetic number, because the mean of its divisors is an integer number (1115901).

Almost surely, 2^3719665 is an apocalyptic number.

It is an amenable number.

3719665 is a deficient number, since it is larger than the sum of its proper divisors (743939).

3719665 is an equidigital number, since it uses as much as digits as its factorization.

3719665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 743938.

The product of its digits is 34020, while the sum is 37.

The square root of 3719665 is about 1928.6433055389. The cubic root of 3719665 is about 154.9415665969.

Subtracting from 3719665 its sum of digits (37), we obtain a triangular number (3719628 = T₂₇₂₇).

The spelling of 3719665 in words is "three million, seven hundred nineteen thousand, six hundred sixty-five".