1923968709 has 24 divisors (see below), whose sum is σ = 3150361760. Its totient is φ = 1121664672.

The previous prime is 1923968611. The next prime is 1923968723. The reversal of 1923968709 is 9078693291.

It is not a de Polignac number, because 1923968709 - 2⁹ = 1923968197 is a prime.

It is a super-2 number, since 2×1923968709² = 7403311186422253362, which contains 22 as substring.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1923968729) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 430519 + ... + 434964.

Almost surely, 2^1923968709 is an apocalyptic number.

1923968709 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

1923968709 is a deficient number, since it is larger than the sum of its proper divisors (1226393051).

1923968709 is a wasteful number, since it uses less digits than its factorization.

1923968709 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 865521 (or 865518 counting only the distinct ones).

The product of its (nonzero) digits is 1469664, while the sum is 54.

The square root of 1923968709 is about 43863.0677107746. The cubic root of 1923968709 is about 1243.7487811777.

The spelling of 1923968709 in words is "one billion, nine hundred twenty-three million, nine hundred sixty-eight thousand, seven hundred nine".