8181049 has 2 divisors, whose sum is σ = 8181050. Its totient is φ = 8181048.

The previous prime is 8181023. The next prime is 8181053. The reversal of 8181049 is 9401818.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7645225 + 535824 = 2765^2 + 732^2 .

It is a cyclic number.

It is not a de Polignac number, because 8181049 - 2⁹ = 8180537 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 8181049.

It is not a weakly prime, because it can be changed into another prime (8181079) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4090524 + 4090525.

It is an arithmetic number, because the mean of its divisors is an integer number (4090525).

Almost surely, 2^8181049 is an apocalyptic number.

It is an amenable number.

8181049 is a deficient number, since it is larger than the sum of its proper divisors (1).

8181049 is an equidigital number, since it uses as much as digits as its factorization.

8181049 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2304, while the sum is 31.

The square root of 8181049 is about 2860.2533104605. The cubic root of 8181049 is about 201.4975011338.

The spelling of 8181049 in words is "eight million, one hundred eighty-one thousand, forty-nine".