1964317989 has 8 divisors (see below), whose sum is σ = 2773154880. Its totient is φ = 1232513216.

The previous prime is 1964317981. The next prime is 1964318003. The reversal of 1964317989 is 9897134691.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1964317989 - 2³ = 1964317981 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1964317981) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19257969 + ... + 19258070.

It is an arithmetic number, because the mean of its divisors is an integer number (346644360).

Almost surely, 2^1964317989 is an apocalyptic number.

It is an amenable number.

1964317989 is a deficient number, since it is larger than the sum of its proper divisors (808836891).

1964317989 is a wasteful number, since it uses less digits than its factorization.

1964317989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38516059.

The product of its digits is 2939328, while the sum is 57.

The square root of 1964317989 is about 44320.6271277833. The cubic root of 1964317989 is about 1252.3832907057.

The spelling of 1964317989 in words is "one billion, nine hundred sixty-four million, three hundred seventeen thousand, nine hundred eighty-nine".