1969143813 has 96 divisors (see below), whose sum is σ = 3728664576. Its totient is φ = 971771904.

The previous prime is 1969143797. The next prime is 1969143817. The reversal of 1969143813 is 3183419691.

It is not a de Polignac number, because 1969143813 - 2⁴ = 1969143797 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 (1969143817) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 3243756 + ... + 3244362.

It is an arithmetic number, because the mean of its divisors is an integer number (38840256).

Almost surely, 2^1969143813 is an apocalyptic number.

1969143813 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1969143813 is a deficient number, since it is larger than the sum of its proper divisors (1759520763).

1969143813 is a wasteful number, since it uses less digits than its factorization.

1969143813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 883 (or 880 counting only the distinct ones).

The product of its digits is 139968, while the sum is 45.

The square root of 1969143813 is about 44375.0359211122. The cubic root of 1969143813 is about 1253.4080465040.

It can be divided in two parts, 19691 and 43813, that added together give a square (63504 = 252²).

The spelling of 1969143813 in words is "one billion, nine hundred sixty-nine million, one hundred forty-three thousand, eight hundred thirteen".