3649694 has 4 divisors (see below), whose sum is σ = 5474544. Its totient is φ = 1824846.

The previous prime is 3649693. The next prime is 3649699. The reversal of 3649694 is 4969463.

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

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3649693) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 912422 + ... + 912425.

It is an arithmetic number, because the mean of its divisors is an integer number (1368636).

Almost surely, 2^3649694 is an apocalyptic number.

3649694 is a deficient number, since it is larger than the sum of its proper divisors (1824850).

3649694 is a wasteful number, since it uses less digits than its factorization.

3649694 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1824849.

The product of its digits is 139968, while the sum is 41.

The square root of 3649694 is about 1910.4172319156. The cubic root of 3649694 is about 153.9638696372.

The spelling of 3649694 in words is "three million, six hundred forty-nine thousand, six hundred ninety-four".