3521969 has 4 divisors (see below), whose sum is σ = 3842160. Its totient is φ = 3201780.

The previous prime is 3521953. The next prime is 3521977. The reversal of 3521969 is 9691253.

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 3521969 - 2⁴ = 3521953 is a prime.

It is a super-2 number, since 2×3521969² = 24808531273922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3521909) 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, 160079 + ... + 160100.

It is an arithmetic number, because the mean of its divisors is an integer number (960540).

Almost surely, 2^3521969 is an apocalyptic number.

It is an amenable number.

3521969 is a deficient number, since it is larger than the sum of its proper divisors (320191).

3521969 is a wasteful number, since it uses less digits than its factorization.

3521969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 320190.

The product of its digits is 14580, while the sum is 35.

The square root of 3521969 is about 1876.6909708314. The cubic root of 3521969 is about 152.1464568306.

The spelling of 3521969 in words is "three million, five hundred twenty-one thousand, nine hundred sixty-nine".