1649959 has 2 divisors, whose sum is σ = 1649960. Its totient is φ = 1649958.

The previous prime is 1649927. The next prime is 1649981. The reversal of 1649959 is 9599461.

It is a strong prime.

It is an emirp because it is prime and its reverse (9599461) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1649959 - 2⁵ = 1649927 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1649059) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 824979 + 824980.

It is an arithmetic number, because the mean of its divisors is an integer number (824980).

2^1649959 is an apocalyptic number.

1649959 is a deficient number, since it is larger than the sum of its proper divisors (1).

1649959 is an equidigital number, since it uses as much as digits as its factorization.

1649959 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 87480, while the sum is 43.

The square root of 1649959 is about 1284.5072985390. The cubic root of 1649959 is about 118.1655962852.

The spelling of 1649959 in words is "one million, six hundred forty-nine thousand, nine hundred fifty-nine".