1959689449 has 2 divisors, whose sum is σ = 1959689450. Its totient is φ = 1959689448.

The previous prime is 1959689441. The next prime is 1959689483. The reversal of 1959689449 is 9449869591.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1954082025 + 5607424 = 44205^2 + 2368^2 .

It is a cyclic number.

It is not a de Polignac number, because 1959689449 - 2³ = 1959689441 is a prime.

It is not a weakly prime, because it can be changed into another prime (1959689441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 979844724 + 979844725.

It is an arithmetic number, because the mean of its divisors is an integer number (979844725).

Almost surely, 2^1959689449 is an apocalyptic number.

It is an amenable number.

1959689449 is a deficient number, since it is larger than the sum of its proper divisors (1).

1959689449 is an equidigital number, since it uses as much as digits as its factorization.

1959689449 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 25194240, while the sum is 64.

The square root of 1959689449 is about 44268.3797873832. The cubic root of 1959689449 is about 1251.3988497782.

The spelling of 1959689449 in words is "one billion, nine hundred fifty-nine million, six hundred eighty-nine thousand, four hundred forty-nine".