1939921193 has 16 divisors (see below), whose sum is σ = 2337275904. Its totient is φ = 1574905680.

The previous prime is 1939921189. The next prime is 1939921201. The reversal of 1939921193 is 3911299391.

It is a cyclic number.

It is not a de Polignac number, because 1939921193 - 2² = 1939921189 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (47).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1939921183) 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, 84905 + ... + 105302.

It is an arithmetic number, because the mean of its divisors is an integer number (146079744).

Almost surely, 2^1939921193 is an apocalyptic number.

It is an amenable number.

1939921193 is a deficient number, since it is larger than the sum of its proper divisors (397354711).

1939921193 is a wasteful number, since it uses less digits than its factorization.

1939921193 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 190292.

The product of its digits is 118098, while the sum is 47.

The square root of 1939921193 is about 44044.5364716215. The cubic root of 1939921193 is about 1247.1768163476.

The spelling of 1939921193 in words is "one billion, nine hundred thirty-nine million, nine hundred twenty-one thousand, one hundred ninety-three".