1913903609 has 8 divisors (see below), whose sum is σ = 1946089728. Its totient is φ = 1881743760.

The previous prime is 1913903599. The next prime is 1913903653. The reversal of 1913903609 is 9063093191.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1913903609 - 2²⁴ = 1897126393 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1913903009) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 188234 + ... + 198140.

It is an arithmetic number, because the mean of its divisors is an integer number (243261216).

Almost surely, 2^1913903609 is an apocalyptic number.

It is an amenable number.

1913903609 is a deficient number, since it is larger than the sum of its proper divisors (32186119).

1913903609 is an equidigital number, since it uses as much as digits as its factorization.

1913903609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13135.

The product of its (nonzero) digits is 39366, while the sum is 41.

The square root of 1913903609 is about 43748.1840651701. The cubic root of 1913903609 is about 1241.5761281511.

The spelling of 1913903609 in words is "one billion, nine hundred thirteen million, nine hundred three thousand, six hundred nine".