3500005 has 4 divisors (see below), whose sum is σ = 4200012. Its totient is φ = 2800000.

The previous prime is 3499999. The next prime is 3500017. The reversal of 3500005 is 5000053.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5000053 = 1091 ⋅4583.

It can be written as a sum of positive squares in 2 ways, for example, as 2259009 + 1240996 = 1503^2 + 1114^2 .

It is not a de Polignac number, because 3500005 - 2⁵ = 3499973 is a prime.

It is a Smith number, since the sum of its digits (13) 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.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 349996 + ... + 350005.

It is an arithmetic number, because the mean of its divisors is an integer number (1050003).

Almost surely, 2^3500005 is an apocalyptic number.

It is an amenable number.

3500005 is a deficient number, since it is larger than the sum of its proper divisors (700007).

3500005 is an equidigital number, since it uses as much as digits as its factorization.

3500005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 700006.

The product of its (nonzero) digits is 75, while the sum is 13.

The square root of 3500005 is about 1870.8300296927. The cubic root of 3500005 is about 151.8295208935.

Adding to 3500005 its reverse (5000053), we get a palindrome (8500058).

The spelling of 3500005 in words is "three million, five hundred thousand, five".