1934147809 has 8 divisors (see below), whose sum is σ = 2201717952. Its totient is φ = 1681867440.

The previous prime is 1934147777. The next prime is 1934147821. The reversal of 1934147809 is 9087414391.

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

It is not a de Polignac number, because 1934147809 - 2⁵ = 1934147777 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1934147209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3822174 + ... + 3822679.

It is an arithmetic number, because the mean of its divisors is an integer number (275214744).

Almost surely, 2^1934147809 is an apocalyptic number.

It is an amenable number.

1934147809 is a deficient number, since it is larger than the sum of its proper divisors (267570143).

1934147809 is a wasteful number, since it uses less digits than its factorization.

1934147809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7644887.

The product of its (nonzero) digits is 217728, while the sum is 46.

The square root of 1934147809 is about 43978.9473384709. The cubic root of 1934147809 is about 1245.9383492758.

The spelling of 1934147809 in words is "one billion, nine hundred thirty-four million, one hundred forty-seven thousand, eight hundred nine".