798967021 has 2 divisors, whose sum is σ = 798967022. Its totient is φ = 798967020.

The previous prime is 798967007. The next prime is 798967069. The reversal of 798967021 is 120769897.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 585398025 + 213568996 = 24195^2 + 14614^2 .

It is a cyclic number.

It is not a de Polignac number, because 798967021 - 2¹³ = 798958829 is a prime.

It is a super-2 number, since 2×798967021² = 1276696601291228882, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (798967621) 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 as a sum of consecutive naturals, namely, 399483510 + 399483511.

It is an arithmetic number, because the mean of its divisors is an integer number (399483511).

Almost surely, 2^798967021 is an apocalyptic number.

It is an amenable number.

798967021 is a deficient number, since it is larger than the sum of its proper divisors (1).

798967021 is an equidigital number, since it uses as much as digits as its factorization.

798967021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 381024, while the sum is 49.

The square root of 798967021 is about 28266.0046876102. The cubic root of 798967021 is about 927.9180393113.

The spelling of 798967021 in words is "seven hundred ninety-eight million, nine hundred sixty-seven thousand, twenty-one".