1964740889 has 2 divisors, whose sum is σ = 1964740890. Its totient is φ = 1964740888.

The previous prime is 1964740873. The next prime is 1964740901. The reversal of 1964740889 is 9880474691.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1961161225 + 3579664 = 44285^2 + 1892^2 .

It is a cyclic number.

It is not a de Polignac number, because 1964740889 - 2⁴ = 1964740873 is a prime.

It is not a weakly prime, because it can be changed into another prime (1964740819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 982370444 + 982370445.

It is an arithmetic number, because the mean of its divisors is an integer number (982370445).

Almost surely, 2^1964740889 is an apocalyptic number.

It is an amenable number.

1964740889 is a deficient number, since it is larger than the sum of its proper divisors (1).

1964740889 is an equidigital number, since it uses as much as digits as its factorization.

1964740889 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3483648, while the sum is 56.

The square root of 1964740889 is about 44325.3977872732. The cubic root of 1964740889 is about 1252.4731598771.

The spelling of 1964740889 in words is "one billion, nine hundred sixty-four million, seven hundred forty thousand, eight hundred eighty-nine".