3806981 has 2 divisors, whose sum is σ = 3806982. Its totient is φ = 3806980.

The previous prime is 3806927. The next prime is 3807053. The reversal of 3806981 is 1896083.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2788900 + 1018081 = 1670^2 + 1009^2 .

It is a cyclic number.

It is not a de Polignac number, because 3806981 - 2¹⁸ = 3544837 is a prime.

It is a super-2 number, since 2×3806981² = 28986208668722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3806911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1903490 + 1903491.

It is an arithmetic number, because the mean of its divisors is an integer number (1903491).

Almost surely, 2^3806981 is an apocalyptic number.

It is an amenable number.

3806981 is a deficient number, since it is larger than the sum of its proper divisors (1).

3806981 is an equidigital number, since it uses as much as digits as its factorization.

3806981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10368, while the sum is 35.

The square root of 3806981 is about 1951.1486360603. The cubic root of 3806981 is about 156.1445761385.

The spelling of 3806981 in words is "three million, eight hundred six thousand, nine hundred eighty-one".