1968830013 has 4 divisors (see below), whose sum is σ = 2625106688. Its totient is φ = 1312553340.

The previous prime is 1968829999. The next prime is 1968830023. The reversal of 1968830013 is 3100388691.

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: 3100388691 = 3 ⋅1033462897.

It is not a de Polignac number, because 1968830013 - 2¹² = 1968825917 is a prime.

It is the 44372-nd Hogben number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1968830023) by changing a digit.

It is a nontrivial repunit in base 44371.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 328138333 + ... + 328138338.

It is an arithmetic number, because the mean of its divisors is an integer number (656276672).

Almost surely, 2^1968830013 is an apocalyptic number.

It is an amenable number.

1968830013 is a deficient number, since it is larger than the sum of its proper divisors (656276675).

1968830013 is an equidigital number, since it uses as much as digits as its factorization.

1968830013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 656276674.

The product of its (nonzero) digits is 31104, while the sum is 39.

The square root of 1968830013 is about 44371.5000084514. The cubic root of 1968830013 is about 1253.3414625167.

The spelling of 1968830013 in words is "one billion, nine hundred sixty-eight million, eight hundred thirty thousand, thirteen".