1959216449 has 4 divisors (see below), whose sum is σ = 1959310980. Its totient is φ = 1959121920.

The previous prime is 1959216437. The next prime is 1959216557. The reversal of 1959216449 is 9446129591.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 1711311424 + 247905025 = 41368^2 + 15745^2 .

It is a cyclic number.

It is not a de Polignac number, because 1959216449 - 2⁴ = 1959216433 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1959216397 and 1959216406.

It is not an unprimeable number, because it can be changed into a prime (1959216419) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1232 + ... + 62609.

It is an arithmetic number, because the mean of its divisors is an integer number (489827745).

Almost surely, 2^1959216449 is an apocalyptic number.

It is an amenable number.

1959216449 is a deficient number, since it is larger than the sum of its proper divisors (94531).

1959216449 is an equidigital number, since it uses as much as digits as its factorization.

1959216449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94530.

The product of its digits is 699840, while the sum is 50.

The square root of 1959216449 is about 44263.0370512463. The cubic root of 1959216449 is about 1251.2981604768.

The spelling of 1959216449 in words is "one billion, nine hundred fifty-nine million, two hundred sixteen thousand, four hundred forty-nine".