3640673 has 4 divisors (see below), whose sum is σ = 3664020. Its totient is φ = 3617328.

The previous prime is 3640661. The next prime is 3640697. The reversal of 3640673 is 3760463.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1517824 + 2122849 = 1232^2 + 1457^2 .

It is a cyclic number.

It is not a de Polignac number, because 3640673 - 2¹⁴ = 3624289 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3640633) 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, 11438 + ... + 11751.

It is an arithmetic number, because the mean of its divisors is an integer number (916005).

Almost surely, 2^3640673 is an apocalyptic number.

It is an amenable number.

3640673 is a deficient number, since it is larger than the sum of its proper divisors (23347).

3640673 is a wasteful number, since it uses less digits than its factorization.

3640673 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23346.

The product of its (nonzero) digits is 9072, while the sum is 29.

The square root of 3640673 is about 1908.0547686060. The cubic root of 3640673 is about 153.8369134258.

The spelling of 3640673 in words is "three million, six hundred forty thousand, six hundred seventy-three".