1964661833 has 2 divisors, whose sum is σ = 1964661834. Its totient is φ = 1964661832.

The previous prime is 1964661781. The next prime is 1964661841. The reversal of 1964661833 is 3381664691.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1822265344 + 142396489 = 42688^2 + 11933^2 .

It is a cyclic number.

It is not a de Polignac number, because 1964661833 - 2²⁰ = 1963613257 is a prime.

It is a super-2 number, since 2×1964661833² = 7719792236093839778, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1964661893) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 982330916 + 982330917.

It is an arithmetic number, because the mean of its divisors is an integer number (982330917).

Almost surely, 2^1964661833 is an apocalyptic number.

It is an amenable number.

1964661833 is a deficient number, since it is larger than the sum of its proper divisors (1).

1964661833 is an equidigital number, since it uses as much as digits as its factorization.

1964661833 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 559872, while the sum is 47.

The square root of 1964661833 is about 44324.5060096557. The cubic root of 1964661833 is about 1252.4563609111.

The spelling of 1964661833 in words is "one billion, nine hundred sixty-four million, six hundred sixty-one thousand, eight hundred thirty-three".