3694921 has 4 divisors (see below), whose sum is σ = 3814144. Its totient is φ = 3575700.

The previous prime is 3694913. The next prime is 3694937. The reversal of 3694921 is 1294963.

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.

It is a cyclic number.

It is not a de Polignac number, because 3694921 - 2³ = 3694913 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3694981) 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, 59565 + ... + 59626.

It is an arithmetic number, because the mean of its divisors is an integer number (953536).

Almost surely, 2^3694921 is an apocalyptic number.

3694921 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

It is an amenable number.

3694921 is a deficient number, since it is larger than the sum of its proper divisors (119223).

3694921 is a wasteful number, since it uses less digits than its factorization.

3694921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119222.

The product of its digits is 11664, while the sum is 34.

The square root of 3694921 is about 1922.2177296030. The cubic root of 3694921 is about 154.5972338923.

The spelling of 3694921 in words is "three million, six hundred ninety-four thousand, nine hundred twenty-one".