1928742161 has 2 divisors, whose sum is σ = 1928742162. Its totient is φ = 1928742160.

The previous prime is 1928742143. The next prime is 1928742163. The reversal of 1928742161 is 1612478291.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1117631761 + 811110400 = 33431^2 + 28480^2 .

It is an emirp because it is prime and its reverse (1612478291) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1928742161 is a prime.

Together with 1928742163, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1928742163) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 964371080 + 964371081.

It is an arithmetic number, because the mean of its divisors is an integer number (964371081).

Almost surely, 2^1928742161 is an apocalyptic number.

It is an amenable number.

1928742161 is a deficient number, since it is larger than the sum of its proper divisors (1).

1928742161 is an equidigital number, since it uses as much as digits as its factorization.

1928742161 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 48384, while the sum is 41.

The square root of 1928742161 is about 43917.4471138749. The cubic root of 1928742161 is about 1244.7765303764.

The spelling of 1928742161 in words is "one billion, nine hundred twenty-eight million, seven hundred forty-two thousand, one hundred sixty-one".