7181849 has 2 divisors, whose sum is σ = 7181850. Its totient is φ = 7181848.

The previous prime is 7181843. The next prime is 7181851. The reversal of 7181849 is 9481817.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4182025 + 2999824 = 2045^2 + 1732^2 .

It is a cyclic number.

It is not a de Polignac number, because 7181849 - 2²⁰ = 6133273 is a prime.

Together with 7181851, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (7181843) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3590924 + 3590925.

It is an arithmetic number, because the mean of its divisors is an integer number (3590925).

Almost surely, 2^7181849 is an apocalyptic number.

It is an amenable number.

7181849 is a deficient number, since it is larger than the sum of its proper divisors (1).

7181849 is an equidigital number, since it uses as much as digits as its factorization.

7181849 is an evil number, because the sum of its binary digits is even.

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

The square root of 7181849 is about 2679.8971995209. The cubic root of 7181849 is about 192.9354755802.

Subtracting 7181849 from its reverse (9481817), we obtain a cube (2299968 = 132³).

The spelling of 7181849 in words is "seven million, one hundred eighty-one thousand, eight hundred forty-nine".