7896181 has 2 divisors, whose sum is σ = 7896182. Its totient is φ = 7896180.

The previous prime is 7896179. The next prime is 7896197. The reversal of 7896181 is 1816987.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7896100 + 81 = 2810^2 + 9^2 .

It is an emirp because it is prime and its reverse (1816987) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 7896181 - 2¹ = 7896179 is a prime.

It is a super-2 number, since 2×7896181² = 124699348769522, which contains 22 as substring.

Together with 7896179, it forms a pair of twin primes.

It is a Chen prime.

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

7896181 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7896481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3948090 + 3948091.

It is an arithmetic number, because the mean of its divisors is an integer number (3948091).

Almost surely, 2^7896181 is an apocalyptic number.

It is an amenable number.

7896181 is a deficient number, since it is larger than the sum of its proper divisors (1).

7896181 is an equidigital number, since it uses as much as digits as its factorization.

7896181 is an evil number, because the sum of its binary digits is even.

The product of its digits is 24192, while the sum is 40.

The square root of 7896181 is about 2810.0144127744. The cubic root of 7896181 is about 199.1310719542.

It can be divided in two parts, 78961 and 81, that multiplied together give a square (6395841 = 2529²).

The spelling of 7896181 in words is "seven million, eight hundred ninety-six thousand, one hundred eighty-one".