3351991 has 4 divisors (see below), whose sum is σ = 3355984. Its totient is φ = 3348000.

The previous prime is 3351949. The next prime is 3352003. The reversal of 3351991 is 1991533.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 3351991 - 2²¹ = 1254839 is a prime.

It is a super-2 number, since 2×3351991² = 22471687328162, 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 (3351191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 195 + ... + 2596.

It is an arithmetic number, because the mean of its divisors is an integer number (838996).

Almost surely, 2^3351991 is an apocalyptic number.

3351991 is a deficient number, since it is larger than the sum of its proper divisors (3993).

3351991 is a wasteful number, since it uses less digits than its factorization.

3351991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3992.

The product of its digits is 3645, while the sum is 31.

The square root of 3351991 is about 1830.8443407346. The cubic root of 3351991 is about 149.6583483444.

The spelling of 3351991 in words is "three million, three hundred fifty-one thousand, nine hundred ninety-one".