3481781 has 2 divisors, whose sum is σ = 3481782. Its totient is φ = 3481780.

The previous prime is 3481759. The next prime is 3481799. The reversal of 3481781 is 1871843.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2856100 + 625681 = 1690^2 + 791^2 .

It is an emirp because it is prime and its reverse (1871843) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3481781 is a prime.

It is a super-2 number, since 2×3481781² = 24245597863922, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3481721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1740890 + 1740891.

It is an arithmetic number, because the mean of its divisors is an integer number (1740891).

Almost surely, 2^3481781 is an apocalyptic number.

It is an amenable number.

3481781 is a deficient number, since it is larger than the sum of its proper divisors (1).

3481781 is an equidigital number, since it uses as much as digits as its factorization.

3481781 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5376, while the sum is 32.

The square root of 3481781 is about 1865.9531076637. The cubic root of 3481781 is about 151.5655443679.

The spelling of 3481781 in words is "three million, four hundred eighty-one thousand, seven hundred eighty-one".