3320731 has 4 divisors (see below), whose sum is σ = 3350232. Its totient is φ = 3291232.

The previous prime is 3320699. The next prime is 3320749. The reversal of 3320731 is 1370233.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1370233 = 643 ⋅2131.

It is a cyclic number.

It is not a de Polignac number, because 3320731 - 2⁵ = 3320699 is a prime.

It is a super-2 number, since 2×3320731² = 22054508748722, which contains 22 as substring.

It is a Duffinian number.

3320731 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 3320699 and 3320708.

It is not an unprimeable number, because it can be changed into a prime (3320771) 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, 14581 + ... + 14806.

It is an arithmetic number, because the mean of its divisors is an integer number (837558).

Almost surely, 2^3320731 is an apocalyptic number.

3320731 is a deficient number, since it is larger than the sum of its proper divisors (29501).

3320731 is a wasteful number, since it uses less digits than its factorization.

3320731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29500.

The product of its (nonzero) digits is 378, while the sum is 19.

The square root of 3320731 is about 1822.2872989735. The cubic root of 3320731 is about 149.1916666205.

Adding to 3320731 its reverse (1370233), we get a palindrome (4690964).

The spelling of 3320731 in words is "three million, three hundred twenty thousand, seven hundred thirty-one".