1959649 has 2 divisors, whose sum is σ = 1959650. Its totient is φ = 1959648.

The previous prime is 1959647. The next prime is 1959673. The reversal of 1959649 is 9469591.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1140624 + 819025 = 1068^2 + 905^2 .

It is a cyclic number.

It is not a de Polignac number, because 1959649 - 2¹ = 1959647 is a prime.

Together with 1959647, it forms a pair of twin primes.

1959649 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (1959647) 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, 979824 + 979825.

It is an arithmetic number, because the mean of its divisors is an integer number (979825).

2^1959649 is an apocalyptic number.

It is an amenable number.

1959649 is a deficient number, since it is larger than the sum of its proper divisors (1).

1959649 is an equidigital number, since it uses as much as digits as its factorization.

1959649 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 1959649 is about 1399.8746372443. The cubic root of 1959649 is about 125.1390239880.

The spelling of 1959649 in words is "one million, nine hundred fifty-nine thousand, six hundred forty-nine".