99785251 has 2 divisors, whose sum is σ = 99785252. Its totient is φ = 99785250.

The previous prime is 99785227. The next prime is 99785299. The reversal of 99785251 is 15258799.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 99785251 - 2⁵ = 99785219 is a prime.

It is not a weakly prime, because it can be changed into another prime (99785051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49892625 + 49892626.

It is an arithmetic number, because the mean of its divisors is an integer number (49892626).

Almost surely, 2^99785251 is an apocalyptic number.

99785251 is a deficient number, since it is larger than the sum of its proper divisors (1).

99785251 is an equidigital number, since it uses as much as digits as its factorization.

99785251 is an evil number, because the sum of its binary digits is even.

The product of its digits is 226800, while the sum is 46.

The square root of 99785251 is about 9989.2567791603. The cubic root of 99785251 is about 463.8263863828.

The spelling of 99785251 in words is "ninety-nine million, seven hundred eighty-five thousand, two hundred fifty-one".