85873834621 has 2 divisors, whose sum is σ = 85873834622. Its totient is φ = 85873834620.

The previous prime is 85873834601. The next prime is 85873834649. The reversal of 85873834621 is 12643837858.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 77944822596 + 7929012025 = 279186^2 + 89045^2 .

It is a cyclic number.

It is not a de Polignac number, because 85873834621 - 2⁵ = 85873834589 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85873834601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42936917310 + 42936917311.

It is an arithmetic number, because the mean of its divisors is an integer number (42936917311).

Almost surely, 2^85873834621 is an apocalyptic number.

It is an amenable number.

85873834621 is a deficient number, since it is larger than the sum of its proper divisors (1).

85873834621 is an equidigital number, since it uses as much as digits as its factorization.

85873834621 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7741440, while the sum is 55.

The spelling of 85873834621 in words is "eighty-five billion, eight hundred seventy-three million, eight hundred thirty-four thousand, six hundred twenty-one".