190728017 has 2 divisors, whose sum is σ = 190728018. Its totient is φ = 190728016.

The previous prime is 190728011. The next prime is 190728037. The reversal of 190728017 is 710827091.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 184987201 + 5740816 = 13601^2 + 2396^2 .

It is a cyclic number.

It is not a de Polignac number, because 190728017 - 2¹⁰ = 190726993 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (190728011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 95364008 + 95364009.

It is an arithmetic number, because the mean of its divisors is an integer number (95364009).

Almost surely, 2^190728017 is an apocalyptic number.

It is an amenable number.

190728017 is a deficient number, since it is larger than the sum of its proper divisors (1).

190728017 is an equidigital number, since it uses as much as digits as its factorization.

190728017 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7056, while the sum is 35.

The square root of 190728017 is about 13810.4314559683. The cubic root of 190728017 is about 575.6230343157.

The spelling of 190728017 in words is "one hundred ninety million, seven hundred twenty-eight thousand, seventeen".