268542993 has 16 divisors (see below), whose sum is σ = 362836800. Its totient is φ = 176647680.

The previous prime is 268542991. The next prime is 268543019. The reversal of 268542993 is 399245862.

It is a happy number.

It is not a de Polignac number, because 268542993 - 2¹ = 268542991 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (268542991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 196633 + ... + 197993.

It is an arithmetic number, because the mean of its divisors is an integer number (22677300).

Almost surely, 2^268542993 is an apocalyptic number.

It is an amenable number.

268542993 is a deficient number, since it is larger than the sum of its proper divisors (94293807).

268542993 is a wasteful number, since it uses less digits than its factorization.

268542993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2192.

The product of its digits is 933120, while the sum is 48.

The square root of 268542993 is about 16387.2814401901. The cubic root of 268542993 is about 645.1657070790.

The spelling of 268542993 in words is "two hundred sixty-eight million, five hundred forty-two thousand, nine hundred ninety-three".