985100621 has 2 divisors, whose sum is σ = 985100622. Its totient is φ = 985100620.

The previous prime is 985100593. The next prime is 985100653. The reversal of 985100621 is 126001589.

It is an a-pointer prime, because the next prime (985100653) can be obtained adding 985100621 to its sum of digits (32).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 847624996 + 137475625 = 29114^2 + 11725^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-985100621 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (985100821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 492550310 + 492550311.

It is an arithmetic number, because the mean of its divisors is an integer number (492550311).

Almost surely, 2^985100621 is an apocalyptic number.

It is an amenable number.

985100621 is a deficient number, since it is larger than the sum of its proper divisors (1).

985100621 is an equidigital number, since it uses as much as digits as its factorization.

985100621 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4320, while the sum is 32.

The square root of 985100621 is about 31386.3126378363. The cubic root of 985100621 is about 995.0086683924.

The spelling of 985100621 in words is "nine hundred eighty-five million, one hundred thousand, six hundred twenty-one".