1913793993 has 16 divisors (see below), whose sum is σ = 2835932800. Its totient is φ = 1275555600.

The previous prime is 1913793979. The next prime is 1913794007. The reversal of 1913793993 is 3993973191.

It is an interprime number because it is at equal distance from previous prime (1913793979) and next prime (1913794007).

It is not a de Polignac number, because 1913793993 - 2¹³ = 1913785801 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1913793923) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 188343 + ... + 198243.

It is an arithmetic number, because the mean of its divisors is an integer number (177245800).

Almost surely, 2^1913793993 is an apocalyptic number.

It is an amenable number.

1913793993 is a deficient number, since it is larger than the sum of its proper divisors (922138807).

1913793993 is an equidigital number, since it uses as much as digits as its factorization.

1913793993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17069 (or 17063 counting only the distinct ones).

The product of its digits is 1240029, while the sum is 54.

The square root of 1913793993 is about 43746.9312409453. The cubic root of 1913793993 is about 1241.5524245527.

The spelling of 1913793993 in words is "one billion, nine hundred thirteen million, seven hundred ninety-three thousand, nine hundred ninety-three".