1961759533 has 2 divisors, whose sum is σ = 1961759534. Its totient is φ = 1961759532.

The previous prime is 1961759509. The next prime is 1961759551. The reversal of 1961759533 is 3359571691.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1725737764 + 236021769 = 41542^2 + 15363^2 .

It is a cyclic number.

It is not a de Polignac number, because 1961759533 - 2²¹ = 1959662381 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1961759563) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 980879766 + 980879767.

It is an arithmetic number, because the mean of its divisors is an integer number (980879767).

Almost surely, 2^1961759533 is an apocalyptic number.

It is an amenable number.

1961759533 is a deficient number, since it is larger than the sum of its proper divisors (1).

1961759533 is an equidigital number, since it uses as much as digits as its factorization.

1961759533 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 765450, while the sum is 49.

The square root of 1961759533 is about 44291.7546841396. The cubic root of 1961759533 is about 1251.8393258834.

The spelling of 1961759533 in words is "one billion, nine hundred sixty-one million, seven hundred fifty-nine thousand, five hundred thirty-three".