190688461 has 2 divisors, whose sum is σ = 190688462. Its totient is φ = 190688460.

The previous prime is 190688453. The next prime is 190688489. The reversal of 190688461 is 164886091.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 143161225 + 47527236 = 11965^2 + 6894^2 .

It is an emirp because it is prime and its reverse (164886091) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 190688461 - 2³ = 190688453 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (190688411) 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, 95344230 + 95344231.

It is an arithmetic number, because the mean of its divisors is an integer number (95344231).

Almost surely, 2^190688461 is an apocalyptic number.

It is an amenable number.

190688461 is a deficient number, since it is larger than the sum of its proper divisors (1).

190688461 is an equidigital number, since it uses as much as digits as its factorization.

190688461 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 82944, while the sum is 43.

The square root of 190688461 is about 13808.9992758346. Note that the first 3 decimals coincide. The cubic root of 190688461 is about 575.5832378219.

The spelling of 190688461 in words is "one hundred ninety million, six hundred eighty-eight thousand, four hundred sixty-one".