1920050409 has 8 divisors (see below), whose sum is σ = 2564749600. Its totient is φ = 1277692416.

The previous prime is 1920050401. The next prime is 1920050411. The reversal of 1920050409 is 9040500291.

It is a happy number.

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

It is not a de Polignac number, because 1920050409 - 2³ = 1920050401 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 (1920050401) 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, 583384 + ... + 586665.

It is an arithmetic number, because the mean of its divisors is an integer number (320593700).

Almost surely, 2^1920050409 is an apocalyptic number.

It is an amenable number.

1920050409 is a deficient number, since it is larger than the sum of its proper divisors (644699191).

1920050409 is a wasteful number, since it uses less digits than its factorization.

1920050409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1170599.

The product of its (nonzero) digits is 3240, while the sum is 30.

The square root of 1920050409 is about 43818.3798080212. The cubic root of 1920050409 is about 1242.9038795421.

The spelling of 1920050409 in words is "one billion, nine hundred twenty million, fifty thousand, four hundred nine".