3693281 has 4 divisors (see below), whose sum is σ = 3697200. Its totient is φ = 3689364.

The previous prime is 3693259. The next prime is 3693299. The reversal of 3693281 is 1823963.

3693281 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 Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3693281 is a prime.

It is a super-2 number, since 2×3693281² = 27280649089922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3693211) 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, 410 + ... + 2748.

It is an arithmetic number, because the mean of its divisors is an integer number (924300).

Almost surely, 2^3693281 is an apocalyptic number.

It is an amenable number.

3693281 is a deficient number, since it is larger than the sum of its proper divisors (3919).

3693281 is a wasteful number, since it uses less digits than its factorization.

3693281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3918.

The product of its digits is 7776, while the sum is 32.

The square root of 3693281 is about 1921.7910916642. The cubic root of 3693281 is about 154.5743577168.

The spelling of 3693281 in words is "three million, six hundred ninety-three thousand, two hundred eighty-one".