174047981021 has 2 divisors, whose sum is σ = 174047981022. Its totient is φ = 174047981020.

The previous prime is 174047981017. The next prime is 174047981047. The reversal of 174047981021 is 120189740471.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 150726415225 + 23321565796 = 388235^2 + 152714^2 .

It is a cyclic number.

It is not a de Polignac number, because 174047981021 - 2² = 174047981017 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (174047981011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 87023990510 + 87023990511.

It is an arithmetic number, because the mean of its divisors is an integer number (87023990511).

Almost surely, 2^174047981021 is an apocalyptic number.

It is an amenable number.

174047981021 is a deficient number, since it is larger than the sum of its proper divisors (1).

174047981021 is an equidigital number, since it uses as much as digits as its factorization.

174047981021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 112896, while the sum is 44.

The spelling of 174047981021 in words is "one hundred seventy-four billion, forty-seven million, nine hundred eighty-one thousand, twenty-one".