3555997 has 4 divisors (see below), whose sum is σ = 3587580. Its totient is φ = 3524416.

The previous prime is 3555977. The next prime is 3556001. The reversal of 3555997 is 7995553.

3555997 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.

It can be written as a sum of positive squares in 2 ways, for example, as 662596 + 2893401 = 814^2 + 1701^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3555997 is a prime.

It is a super-2 number, since 2×3555997² = 25290229328018, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3555947) 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, 15622 + ... + 15847.

It is an arithmetic number, because the mean of its divisors is an integer number (896895).

Almost surely, 2^3555997 is an apocalyptic number.

It is an amenable number.

3555997 is a deficient number, since it is larger than the sum of its proper divisors (31583).

3555997 is a wasteful number, since it uses less digits than its factorization.

3555997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31582.

The product of its digits is 212625, while the sum is 43.

The square root of 3555997 is about 1885.7351351661. The cubic root of 3555997 is about 152.6348820092.

The spelling of 3555997 in words is "three million, five hundred fifty-five thousand, nine hundred ninety-seven".