986872261 has 2 divisors, whose sum is σ = 986872262. Its totient is φ = 986872260.

The previous prime is 986872171. The next prime is 986872283. The reversal of 986872261 is 162278689.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 954439236 + 32433025 = 30894^2 + 5695^2 .

It is a cyclic number.

It is not a de Polignac number, because 986872261 - 2¹³ = 986864069 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (986872961) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 493436130 + 493436131.

It is an arithmetic number, because the mean of its divisors is an integer number (493436131).

Almost surely, 2^986872261 is an apocalyptic number.

It is an amenable number.

986872261 is a deficient number, since it is larger than the sum of its proper divisors (1).

986872261 is an equidigital number, since it uses as much as digits as its factorization.

986872261 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 580608, while the sum is 49.

The square root of 986872261 is about 31414.5230904434. The cubic root of 986872261 is about 995.6047974968.

The spelling of 986872261 in words is "nine hundred eighty-six million, eight hundred seventy-two thousand, two hundred sixty-one".