986261021 has 2 divisors, whose sum is σ = 986261022. Its totient is φ = 986261020.

The previous prime is 986260991. The next prime is 986261033. The reversal of 986261021 is 120162689.

986261021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 934219225 + 52041796 = 30565^2 + 7214^2 .

It is a cyclic number.

It is not a de Polignac number, because 986261021 - 2¹⁸ = 985998877 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (986261041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 493130510 + 493130511.

It is an arithmetic number, because the mean of its divisors is an integer number (493130511).

Almost surely, 2^986261021 is an apocalyptic number.

It is an amenable number.

986261021 is a deficient number, since it is larger than the sum of its proper divisors (1).

986261021 is an equidigital number, since it uses as much as digits as its factorization.

986261021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10368, while the sum is 35.

The square root of 986261021 is about 31404.7929622215. The cubic root of 986261021 is about 995.3992054853.

The spelling of 986261021 in words is "nine hundred eighty-six million, two hundred sixty-one thousand, twenty-one".