3438781 has 2 divisors, whose sum is σ = 3438782. Its totient is φ = 3438780.

The previous prime is 3438767. The next prime is 3438797. The reversal of 3438781 is 1878343.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1836025 + 1602756 = 1355^2 + 1266^2 .

It is a cyclic number.

It is not a de Polignac number, because 3438781 - 2⁵ = 3438749 is a prime.

It is a super-2 number, since 2×3438781² = 23650429531922, which contains 22 as substring.

It is an Ulam number.

It is an alternating number because its digits alternate between odd and even.

It is a plaindrome in base 16.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3438731) 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, 1719390 + 1719391.

It is an arithmetic number, because the mean of its divisors is an integer number (1719391).

Almost surely, 2^3438781 is an apocalyptic number.

It is an amenable number.

3438781 is a deficient number, since it is larger than the sum of its proper divisors (1).

3438781 is an equidigital number, since it uses as much as digits as its factorization.

3438781 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 16128, while the sum is 34.

The square root of 3438781 is about 1854.3950496051. The cubic root of 3438781 is about 150.9390131330.

The spelling of 3438781 in words is "three million, four hundred thirty-eight thousand, seven hundred eighty-one".