247985099 has 2 divisors, whose sum is σ = 247985100. Its totient is φ = 247985098.

The previous prime is 247985077. The next prime is 247985123. The reversal of 247985099 is 990589742.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 247985099 - 2¹⁶ = 247919563 is a prime.

It is a super-2 number, since 2×247985099² = 122993218652079602, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 247985099.

It is not a weakly prime, because it can be changed into another prime (247985009) 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, 123992549 + 123992550.

It is an arithmetic number, because the mean of its divisors is an integer number (123992550).

Almost surely, 2^247985099 is an apocalyptic number.

247985099 is a deficient number, since it is larger than the sum of its proper divisors (1).

247985099 is an equidigital number, since it uses as much as digits as its factorization.

247985099 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1632960, while the sum is 53.

The square root of 247985099 is about 15747.5426336937. The cubic root of 247985099 is about 628.2635469700.

It can be divided in two parts, 2479 and 85099, that added together give a palindrome (87578).

The spelling of 247985099 in words is "two hundred forty-seven million, nine hundred eighty-five thousand, ninety-nine".