992171641 has 2 divisors, whose sum is σ = 992171642. Its totient is φ = 992171640.

The previous prime is 992171639. The next prime is 992171701. The reversal of 992171641 is 146171299.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 815388025 + 176783616 = 28555^2 + 13296^2 .

It is a cyclic number.

It is not a de Polignac number, because 992171641 - 2¹ = 992171639 is a prime.

Together with 992171639, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 992171594 and 992171603.

It is not a weakly prime, because it can be changed into another prime (992174641) 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, 496085820 + 496085821.

It is an arithmetic number, because the mean of its divisors is an integer number (496085821).

Almost surely, 2^992171641 is an apocalyptic number.

It is an amenable number.

992171641 is a deficient number, since it is larger than the sum of its proper divisors (1).

992171641 is an equidigital number, since it uses as much as digits as its factorization.

992171641 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 27216, while the sum is 40.

The square root of 992171641 is about 31498.7561817923. The cubic root of 992171641 is about 997.3837079856.

The spelling of 992171641 in words is "nine hundred ninety-two million, one hundred seventy-one thousand, six hundred forty-one".