1923994013 has 4 divisors (see below), whose sum is σ = 1986058368. Its totient is φ = 1861929660.

The previous prime is 1923994001. The next prime is 1923994019. The reversal of 1923994013 is 3104993291.

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: 3104993291 = 3449 ⋅900259.

It is a cyclic number.

It is not a de Polignac number, because 1923994013 - 2¹⁸ = 1923731869 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1923994019) 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, 31032131 + ... + 31032192.

It is an arithmetic number, because the mean of its divisors is an integer number (496514592).

Almost surely, 2^1923994013 is an apocalyptic number.

It is an amenable number.

1923994013 is a deficient number, since it is larger than the sum of its proper divisors (62064355).

1923994013 is an equidigital number, since it uses as much as digits as its factorization.

1923994013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62064354.

The product of its (nonzero) digits is 52488, while the sum is 41.

The square root of 1923994013 is about 43863.3561529439. The cubic root of 1923994013 is about 1243.7542337406.

The spelling of 1923994013 in words is "one billion, nine hundred twenty-three million, nine hundred ninety-four thousand, thirteen".