986260991 has 2 divisors, whose sum is σ = 986260992. Its totient is φ = 986260990.

The previous prime is 986260973. The next prime is 986261021. The reversal of 986260991 is 199062689.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 986260991 - 2¹⁸ = 985998847 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (986260921) 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, 493130495 + 493130496.

It is an arithmetic number, because the mean of its divisors is an integer number (493130496).

Almost surely, 2^986260991 is an apocalyptic number.

986260991 is a deficient number, since it is larger than the sum of its proper divisors (1).

986260991 is an equidigital number, since it uses as much as digits as its factorization.

986260991 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 419904, while the sum is 50.

The square root of 986260991 is about 31404.7924845874. The cubic root of 986260991 is about 995.3991953927.

The spelling of 986260991 in words is "nine hundred eighty-six million, two hundred sixty thousand, nine hundred ninety-one".