1648968089 has 4 divisors (see below), whose sum is σ = 1702160640. Its totient is φ = 1595775540.

The previous prime is 1648968073. The next prime is 1648968109. The reversal of 1648968089 is 9808698461.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 9808698461 = 42223 ⋅232307.

It is a cyclic number.

It is not a de Polignac number, because 1648968089 - 2⁴ = 1648968073 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1648968689) 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, 26596229 + ... + 26596290.

It is an arithmetic number, because the mean of its divisors is an integer number (425540160).

Almost surely, 2^1648968089 is an apocalyptic number.

It is an amenable number.

1648968089 is a deficient number, since it is larger than the sum of its proper divisors (53192551).

1648968089 is an equidigital number, since it uses as much as digits as its factorization.

1648968089 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53192550.

The product of its (nonzero) digits is 5971968, while the sum is 59.

The square root of 1648968089 is about 40607.4880902525. The cubic root of 1648968089 is about 1181.4193609375.

The spelling of 1648968089 in words is "one billion, six hundred forty-eight million, nine hundred sixty-eight thousand, eighty-nine".