1965953913 has 24 divisors (see below), whose sum is σ = 3292841664. Its totient is φ = 1021273440.

The previous prime is 1965953909. The next prime is 1965953971. The reversal of 1965953913 is 3193595691.

It is not a de Polignac number, because 1965953913 - 2² = 1965953909 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1965943913) 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 in 23 ways as a sum of consecutive naturals, for example, 384306 + ... + 389387.

It is an arithmetic number, because the mean of its divisors is an integer number (137201736).

Almost surely, 2^1965953913 is an apocalyptic number.

It is an amenable number.

1965953913 is a deficient number, since it is larger than the sum of its proper divisors (1326887751).

1965953913 is a wasteful number, since it uses less digits than its factorization.

1965953913 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 773725 (or 773714 counting only the distinct ones).

The product of its digits is 984150, while the sum is 51.

The square root of 1965953913 is about 44339.0788469946. The cubic root of 1965953913 is about 1252.7308643326.

The spelling of 1965953913 in words is "one billion, nine hundred sixty-five million, nine hundred fifty-three thousand, nine hundred thirteen".