1928196971 has 4 divisors (see below), whose sum is σ = 1931482392. Its totient is φ = 1924911552.

The previous prime is 1928196917. The next prime is 1928197009. The reversal of 1928196971 is 1796918291.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1928196971 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1928196901) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1641830 + ... + 1643003.

It is an arithmetic number, because the mean of its divisors is an integer number (482870598).

Almost surely, 2^1928196971 is an apocalyptic number.

1928196971 is a deficient number, since it is larger than the sum of its proper divisors (3285421).

1928196971 is an equidigital number, since it uses as much as digits as its factorization.

1928196971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3285420.

The product of its digits is 489888, while the sum is 53.

The square root of 1928196971 is about 43911.2396887175. The cubic root of 1928196971 is about 1244.6592339534.

The spelling of 1928196971 in words is "one billion, nine hundred twenty-eight million, one hundred ninety-six thousand, nine hundred seventy-one".