1964648233 has 4 divisors (see below), whose sum is σ = 1964813508. Its totient is φ = 1964482960.

The previous prime is 1964648221. The next prime is 1964648243. The reversal of 1964648233 is 3328464691.

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 856557289 + 1108090944 = 29267^2 + 33288^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1964648233 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1964648243) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 63298 + ... + 89083.

It is an arithmetic number, because the mean of its divisors is an integer number (491203377).

Almost surely, 2^1964648233 is an apocalyptic number.

It is an amenable number.

1964648233 is a deficient number, since it is larger than the sum of its proper divisors (165275).

1964648233 is a wasteful number, since it uses less digits than its factorization.

1964648233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 165274.

The product of its digits is 746496, while the sum is 46.

The square root of 1964648233 is about 44324.3525953849. The cubic root of 1964648233 is about 1252.4534709403.

The spelling of 1964648233 in words is "one billion, nine hundred sixty-four million, six hundred forty-eight thousand, two hundred thirty-three".