99986251 has 2 divisors, whose sum is σ = 99986252. Its totient is φ = 99986250.

The previous prime is 99986233. The next prime is 99986269. The reversal of 99986251 is 15268999.

It is a balanced prime because it is at equal distance from previous prime (99986233) and next prime (99986269).

It is a cyclic number.

It is not a de Polignac number, because 99986251 - 2⁷ = 99986123 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 99986195 and 99986204.

It is not a weakly prime, because it can be changed into another prime (99986351) 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, 49993125 + 49993126.

It is an arithmetic number, because the mean of its divisors is an integer number (49993126).

Almost surely, 2^99986251 is an apocalyptic number.

99986251 is a deficient number, since it is larger than the sum of its proper divisors (1).

99986251 is an equidigital number, since it uses as much as digits as its factorization.

99986251 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 349920, while the sum is 49.

The square root of 99986251 is about 9999.3125263690. The cubic root of 99986251 is about 464.1376099847.

The spelling of 99986251 in words is "ninety-nine million, nine hundred eighty-six thousand, two hundred fifty-one".