842017901 has 2 divisors, whose sum is σ = 842017902. Its totient is φ = 842017900.

The previous prime is 842017853. The next prime is 842017921. The reversal of 842017901 is 109710248.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 742617001 + 99400900 = 27251^2 + 9970^2 .

It is a cyclic number.

It is not a de Polignac number, because 842017901 - 2¹⁸ = 841755757 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (842017921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 421008950 + 421008951.

It is an arithmetic number, because the mean of its divisors is an integer number (421008951).

Almost surely, 2^842017901 is an apocalyptic number.

It is an amenable number.

842017901 is a deficient number, since it is larger than the sum of its proper divisors (1).

842017901 is an equidigital number, since it uses as much as digits as its factorization.

842017901 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4032, while the sum is 32.

The square root of 842017901 is about 29017.5447100543. The cubic root of 842017901 is about 944.2937346748.

The spelling of 842017901 in words is "eight hundred forty-two million, seventeen thousand, nine hundred one".