190688481 has 9 divisors (see below), whose sum is σ = 275498769. Its totient is φ = 127098036.

The previous prime is 190688461. The next prime is 190688489. The reversal of 190688481 is 184886091.

The square root of 190688481 is 13809.

It is a perfect power (a square), and thus also a powerful number.

190688481 is a `hidden beast` number, since 1 + 90 + 6 + 88 + 481 = 666.

It is a tau number, because it is divible by the number of its divisors (9).

It is not a de Polignac number, because 190688481 - 2¹³ = 190680289 is a prime.

It is a super-2 number, since 2×190688481² = 72724193572174722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (190688489) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 39126 + ... + 43728.

Almost surely, 2^190688481 is an apocalyptic number.

190688481 is the 13809-th square number.

190688481 is the 6905-th centered octagonal number.

It is an amenable number.

190688481 is a deficient number, since it is larger than the sum of its proper divisors (84810288).

190688481 is an frugal number, since it uses more digits than its factorization.

190688481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9212 (or 4606 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 45.

The cubic root of 190688481 is about 575.5832579449.

The spelling of 190688481 in words is "one hundred ninety million, six hundred eighty-eight thousand, four hundred eighty-one".