1849979 has 2 divisors, whose sum is σ = 1849980. Its totient is φ = 1849978.

The previous prime is 1849933. The next prime is 1850021. The reversal of 1849979 is 9799481.

It is a strong prime.

It is an emirp because it is prime and its reverse (9799481) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1849979 - 2⁸ = 1849723 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1849909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 924989 + 924990.

It is an arithmetic number, because the mean of its divisors is an integer number (924990).

2^1849979 is an apocalyptic number.

1849979 is a deficient number, since it is larger than the sum of its proper divisors (1).

1849979 is an equidigital number, since it uses as much as digits as its factorization.

1849979 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 163296, while the sum is 47.

The square root of 1849979 is about 1360.1393310981. The cubic root of 1849979 is about 122.7596381198.

The spelling of 1849979 in words is "one million, eight hundred forty-nine thousand, nine hundred seventy-nine".