1964143945 has 4 divisors (see below), whose sum is σ = 2356972740. Its totient is φ = 1571315152.

The previous prime is 1964143933. The next prime is 1964143963. The reversal of 1964143945 is 5493414691.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 690796089 + 1273347856 = 26283^2 + 35684^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1964143945 is a prime.

It is a super-2 number, since 2×1964143945² = 7715722873360326050, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1964143895 and 1964143904.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 196414390 + ... + 196414399.

It is an arithmetic number, because the mean of its divisors is an integer number (589243185).

Almost surely, 2^1964143945 is an apocalyptic number.

It is an amenable number.

1964143945 is a deficient number, since it is larger than the sum of its proper divisors (392828795).

1964143945 is an equidigital number, since it uses as much as digits as its factorization.

1964143945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 392828794.

The product of its digits is 466560, while the sum is 46.

The square root of 1964143945 is about 44318.6636192925. The cubic root of 1964143945 is about 1252.3463014069.

The spelling of 1964143945 in words is "one billion, nine hundred sixty-four million, one hundred forty-three thousand, nine hundred forty-five".