1964735897 has 2 divisors, whose sum is σ = 1964735898. Its totient is φ = 1964735896.

The previous prime is 1964735893. The next prime is 1964735953. The reversal of 1964735897 is 7985374691.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1870043536 + 94692361 = 43244^2 + 9731^2 .

It is a cyclic number.

It is not a de Polignac number, because 1964735897 - 2² = 1964735893 is a prime.

It is not a weakly prime, because it can be changed into another prime (1964735891) 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, 982367948 + 982367949.

It is an arithmetic number, because the mean of its divisors is an integer number (982367949).

Almost surely, 2^1964735897 is an apocalyptic number.

It is an amenable number.

1964735897 is a deficient number, since it is larger than the sum of its proper divisors (1).

1964735897 is an equidigital number, since it uses as much as digits as its factorization.

1964735897 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11430720, while the sum is 59.

The square root of 1964735897 is about 44325.3414764060. The cubic root of 1964735897 is about 1252.4720991178.

The spelling of 1964735897 in words is "one billion, nine hundred sixty-four million, seven hundred thirty-five thousand, eight hundred ninety-seven".