8181007 has 2 divisors, whose sum is σ = 8181008. Its totient is φ = 8181006.

The previous prime is 8180989. The next prime is 8181011. The reversal of 8181007 is 7001818.

8181007 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 8181007 - 2¹¹ = 8178959 is a prime.

8181007 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8182007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4090503 + 4090504.

It is an arithmetic number, because the mean of its divisors is an integer number (4090504).

Almost surely, 2^8181007 is an apocalyptic number.

8181007 is a deficient number, since it is larger than the sum of its proper divisors (1).

8181007 is an equidigital number, since it uses as much as digits as its factorization.

8181007 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 448, while the sum is 25.

The square root of 8181007 is about 2860.2459684440. The cubic root of 8181007 is about 201.4971563161.

The spelling of 8181007 in words is "eight million, one hundred eighty-one thousand, seven".