3518981 has 2 divisors, whose sum is σ = 3518982. Its totient is φ = 3518980.

The previous prime is 3518953. The next prime is 3518987. The reversal of 3518981 is 1898153.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3330625 + 188356 = 1825^2 + 434^2 .

It is an emirp because it is prime and its reverse (1898153) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3518981 - 2¹⁰ = 3517957 is a prime.

It is a super-2 number, since 2×3518981² = 24766454556722, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3518987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1759490 + 1759491.

It is an arithmetic number, because the mean of its divisors is an integer number (1759491).

Almost surely, 2^3518981 is an apocalyptic number.

It is an amenable number.

3518981 is a deficient number, since it is larger than the sum of its proper divisors (1).

3518981 is an equidigital number, since it uses as much as digits as its factorization.

3518981 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8640, while the sum is 35.

The square root of 3518981 is about 1875.8947198604. The cubic root of 3518981 is about 152.1034181935.

The spelling of 3518981 in words is "three million, five hundred eighteen thousand, nine hundred eighty-one".