3945653 has 4 divisors (see below), whose sum is σ = 4081740. Its totient is φ = 3809568.

The previous prime is 3945647. The next prime is 3945659. The reversal of 3945653 is 3565493.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3565493 = 1759 ⋅2027.

It is an interprime number because it is at equal distance from previous prime (3945647) and next prime (3945659).

It can be written as a sum of positive squares in 2 ways, for example, as 1129969 + 2815684 = 1063^2 + 1678^2 .

It is a cyclic number.

It is not a de Polignac number, because 3945653 - 2¹⁴ = 3929269 is a prime.

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 (3945659) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 68000 + ... + 68057.

It is an arithmetic number, because the mean of its divisors is an integer number (1020435).

Almost surely, 2^3945653 is an apocalyptic number.

It is an amenable number.

3945653 is a deficient number, since it is larger than the sum of its proper divisors (136087).

3945653 is a wasteful number, since it uses less digits than its factorization.

3945653 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136086.

The product of its digits is 48600, while the sum is 35.

The square root of 3945653 is about 1986.3667838544. The cubic root of 3945653 is about 158.0179037555.

The spelling of 3945653 in words is "three million, nine hundred forty-five thousand, six hundred fifty-three".