268999999 has 2 divisors, whose sum is σ = 269000000. Its totient is φ = 268999998.

The previous prime is 268999987. The next prime is 269000009. The reversal of 268999999 is 999999862.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 268999999 - 2⁹ = 268999487 is a prime.

268999999 is a modest number, since divided by 99999 gives 2689 as remainder.

It is a plaindrome in base 10.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (268999909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 134499999 + 134500000.

It is an arithmetic number, because the mean of its divisors is an integer number (134500000).

Almost surely, 2^268999999 is an apocalyptic number.

268999999 is a deficient number, since it is larger than the sum of its proper divisors (1).

268999999 is an equidigital number, since it uses as much as digits as its factorization.

268999999 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 51018336, while the sum is 70.

The square root of 268999999 is about 16401.2194363712. The cubic root of 268999999 is about 645.5314802940.

The spelling of 268999999 in words is "two hundred sixty-eight million, nine hundred ninety-nine thousand, nine hundred ninety-nine".