7814981 has 2 divisors, whose sum is σ = 7814982. Its totient is φ = 7814980.

The previous prime is 7814971. The next prime is 7815013. The reversal of 7814981 is 1894187.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5924356 + 1890625 = 2434^2 + 1375^2 .

It is a cyclic number.

It is not a de Polignac number, because 7814981 - 2¹⁰ = 7813957 is a prime.

It is a super-2 number, since 2×7814981² = 122147856060722, which contains 22 as substring.

It is a Sophie Germain prime.

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

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7814921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3907490 + 3907491.

It is an arithmetic number, because the mean of its divisors is an integer number (3907491).

Almost surely, 2^7814981 is an apocalyptic number.

It is an amenable number.

7814981 is a deficient number, since it is larger than the sum of its proper divisors (1).

7814981 is an equidigital number, since it uses as much as digits as its factorization.

7814981 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 16128, while the sum is 38.

The square root of 7814981 is about 2795.5287514172. The cubic root of 7814981 is about 198.4461337637.

The spelling of 7814981 in words is "seven million, eight hundred fourteen thousand, nine hundred eighty-one".