1487819 has 2 divisors, whose sum is σ = 1487820. Its totient is φ = 1487818.

The previous prime is 1487809. The next prime is 1487821. The reversal of 1487819 is 9187841.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1487819 is a prime.

It is a super-2 number, since 2×1487819² = 4427210753522, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 1487821, 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 (1487809) 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, 743909 + 743910.

It is an arithmetic number, because the mean of its divisors is an integer number (743910).

2^1487819 is an apocalyptic number.

1487819 is a deficient number, since it is larger than the sum of its proper divisors (1).

1487819 is an equidigital number, since it uses as much as digits as its factorization.

1487819 is an odious number, because the sum of its binary digits is odd.

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

The square root of 1487819 is about 1219.7618620042. The cubic root of 1487819 is about 114.1607202638.

The spelling of 1487819 in words is "one million, four hundred eighty-seven thousand, eight hundred nineteen".