3520997 has 4 divisors (see below), whose sum is σ = 3536736. Its totient is φ = 3505260.

The previous prime is 3520991. The next prime is 3520999. The reversal of 3520997 is 7990253.

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 an emirpimes, since its reverse is a distinct semiprime: 7990253 = 1201 ⋅6653.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3520997 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3520991) 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, 7529 + ... + 7982.

It is an arithmetic number, because the mean of its divisors is an integer number (884184).

Almost surely, 2^3520997 is an apocalyptic number.

It is an amenable number.

3520997 is a deficient number, since it is larger than the sum of its proper divisors (15739).

3520997 is a wasteful number, since it uses less digits than its factorization.

3520997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15738.

The product of its (nonzero) digits is 17010, while the sum is 35.

The square root of 3520997 is about 1876.4319865106. The cubic root of 3520997 is about 152.1324589823.

The spelling of 3520997 in words is "three million, five hundred twenty thousand, nine hundred ninety-seven".