3493813 has 4 divisors (see below), whose sum is σ = 3559788. Its totient is φ = 3427840.

The previous prime is 3493811. The next prime is 3493817. The reversal of 3493813 is 3183943.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3183943 = 7 ⋅454849.

It can be written as a sum of positive squares in 2 ways, for example, as 1162084 + 2331729 = 1078^2 + 1527^2 .

It is a cyclic number.

It is not a de Polignac number, because 3493813 - 2¹ = 3493811 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

3493813 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3493811) 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, 32908 + ... + 33013.

It is an arithmetic number, because the mean of its divisors is an integer number (889947).

Almost surely, 2^3493813 is an apocalyptic number.

It is an amenable number.

3493813 is a deficient number, since it is larger than the sum of its proper divisors (65975).

3493813 is an equidigital number, since it uses as much as digits as its factorization.

3493813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65974.

The product of its digits is 7776, while the sum is 31.

The square root of 3493813 is about 1869.1744166878. The cubic root of 3493813 is about 151.7399321314.

The spelling of 3493813 in words is "three million, four hundred ninety-three thousand, eight hundred thirteen".