190989731697 has 8 divisors (see below), whose sum is σ = 262867587840. Its totient is φ = 123219181680.

The previous prime is 190989731689. The next prime is 190989731701. The reversal of 190989731697 is 796137989091.

190989731697 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 190989731697 - 2³ = 190989731689 is a prime.

It is a super-2 number, since 2×190989731697² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (190989731677) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1026826422 + ... + 1026826607.

It is an arithmetic number, because the mean of its divisors is an integer number (32858448480).

Almost surely, 2^190989731697 is an apocalyptic number.

It is an amenable number.

190989731697 is a deficient number, since it is larger than the sum of its proper divisors (71877856143).

190989731697 is a wasteful number, since it uses less digits than its factorization.

190989731697 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2053653063.

The product of its (nonzero) digits is 46294416, while the sum is 69.

The spelling of 190989731697 in words is "one hundred ninety billion, nine hundred eighty-nine million, seven hundred thirty-one thousand, six hundred ninety-seven".