1618849 has 2 divisors, whose sum is σ = 1618850. Its totient is φ = 1618848.

The previous prime is 1618831. The next prime is 1618853. The reversal of 1618849 is 9488161.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1607824 + 11025 = 1268^2 + 105^2 .

It is an emirp because it is prime and its reverse (9488161) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1618849 - 2⁵ = 1618817 is a prime.

1618849 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (1618829) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 809424 + 809425.

It is an arithmetic number, because the mean of its divisors is an integer number (809425).

2^1618849 is an apocalyptic number.

It is an amenable number.

1618849 is a deficient number, since it is larger than the sum of its proper divisors (1).

1618849 is an equidigital number, since it uses as much as digits as its factorization.

1618849 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13824, while the sum is 37.

The square root of 1618849 is about 1272.3399702910. The cubic root of 1618849 is about 117.4182077521.

The spelling of 1618849 in words is "one million, six hundred eighteen thousand, eight hundred forty-nine".