161928061 has 2 divisors, whose sum is σ = 161928062. Its totient is φ = 161928060.

The previous prime is 161928007. The next prime is 161928101. The reversal of 161928061 is 160829161.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 138791961 + 23136100 = 11781^2 + 4810^2 .

It is a cyclic number.

It is not a de Polignac number, because 161928061 - 2²³ = 153539453 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (161928161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80964030 + 80964031.

It is an arithmetic number, because the mean of its divisors is an integer number (80964031).

Almost surely, 2^161928061 is an apocalyptic number.

It is an amenable number.

161928061 is a deficient number, since it is larger than the sum of its proper divisors (1).

161928061 is an equidigital number, since it uses as much as digits as its factorization.

161928061 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5184, while the sum is 34.

The square root of 161928061 is about 12725.0957167323. The cubic root of 161928061 is about 545.0554734096.

The spelling of 161928061 in words is "one hundred sixty-one million, nine hundred twenty-eight thousand, sixty-one".