3495781 has 2 divisors, whose sum is σ = 3495782. Its totient is φ = 3495780.

The previous prime is 3495773. The next prime is 3495799. The reversal of 3495781 is 1875943.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3441025 + 54756 = 1855^2 + 234^2 .

It is an emirp because it is prime and its reverse (1875943) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3495781 - 2³ = 3495773 is a prime.

It is a super-2 number, since 2×3495781² = 24440969599922, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 3495781.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3495731) 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 as a sum of consecutive naturals, namely, 1747890 + 1747891.

It is an arithmetic number, because the mean of its divisors is an integer number (1747891).

Almost surely, 2^3495781 is an apocalyptic number.

It is an amenable number.

3495781 is a deficient number, since it is larger than the sum of its proper divisors (1).

3495781 is an equidigital number, since it uses as much as digits as its factorization.

3495781 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 30240, while the sum is 37.

The square root of 3495781 is about 1869.7007781995. The cubic root of 3495781 is about 151.7684175459.

The spelling of 3495781 in words is "three million, four hundred ninety-five thousand, seven hundred eighty-one".