3654691 has 4 divisors (see below), whose sum is σ = 3658984. Its totient is φ = 3650400.

The previous prime is 3654689. The next prime is 3654709. The reversal of 3654691 is 1964563.

3654691 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 a brilliant number, because the two primes have the same length.

It is a 5-Lehmer number, since φ(3654691) divides (3654691-1)⁵.

It is a cyclic number.

It is not a de Polignac number, because 3654691 - 2¹ = 3654689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3654641) 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, 390 + ... + 2731.

It is an arithmetic number, because the mean of its divisors is an integer number (914746).

Almost surely, 2^3654691 is an apocalyptic number.

3654691 is a deficient number, since it is larger than the sum of its proper divisors (4293).

3654691 is a wasteful number, since it uses less digits than its factorization.

3654691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4292.

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

The square root of 3654691 is about 1911.7246140593. The cubic root of 3654691 is about 154.0341044387.

The spelling of 3654691 in words is "three million, six hundred fifty-four thousand, six hundred ninety-one".