190928161 has 2 divisors, whose sum is σ = 190928162. Its totient is φ = 190928160.

The previous prime is 190928119. The next prime is 190928167. The reversal of 190928161 is 161829091.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 188897536 + 2030625 = 13744^2 + 1425^2 .

It is a cyclic number.

It is not a de Polignac number, because 190928161 - 2⁷ = 190928033 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 190928161.

It is not a weakly prime, because it can be changed into another prime (190928167) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 95464080 + 95464081.

It is an arithmetic number, because the mean of its divisors is an integer number (95464081).

Almost surely, 2^190928161 is an apocalyptic number.

It is an amenable number.

190928161 is a deficient number, since it is larger than the sum of its proper divisors (1).

190928161 is an equidigital number, since it uses as much as digits as its factorization.

190928161 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7776, while the sum is 37.

The square root of 190928161 is about 13817.6756728474. The cubic root of 190928161 is about 575.8243108481.

The spelling of 190928161 in words is "one hundred ninety million, nine hundred twenty-eight thousand, one hundred sixty-one".