3691645 has 8 divisors (see below), whose sum is σ = 4492800. Its totient is φ = 2911440.

The previous prime is 3691627. The next prime is 3691657. The reversal of 3691645 is 5461963.

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

It is not a de Polignac number, because 3691645 - 2¹¹ = 3689597 is a prime.

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 3691645.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4845 + ... + 5554.

It is an arithmetic number, because the mean of its divisors is an integer number (561600).

Almost surely, 2^3691645 is an apocalyptic number.

It is an amenable number.

3691645 is a deficient number, since it is larger than the sum of its proper divisors (801155).

3691645 is a wasteful number, since it uses less digits than its factorization.

3691645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10475.

The product of its digits is 19440, while the sum is 34.

The square root of 3691645 is about 1921.3653999175. The cubic root of 3691645 is about 154.5515305884.

The spelling of 3691645 in words is "three million, six hundred ninety-one thousand, six hundred forty-five".