268078091 has 4 divisors (see below), whose sum is σ = 268549800. Its totient is φ = 267606384.

The previous prime is 268078079. The next prime is 268078093. The reversal of 268078091 is 190870862.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 268078091 - 2¹⁰ = 268077067 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (268078093) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 235001 + ... + 236138.

It is an arithmetic number, because the mean of its divisors is an integer number (67137450).

Almost surely, 2^268078091 is an apocalyptic number.

268078091 is a deficient number, since it is larger than the sum of its proper divisors (471709).

268078091 is an equidigital number, since it uses as much as digits as its factorization.

268078091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 471708.

The product of its (nonzero) digits is 48384, while the sum is 41.

The square root of 268078091 is about 16373.0904535460. The cubic root of 268078091 is about 644.7931881070.

The spelling of 268078091 in words is "two hundred sixty-eight million, seventy-eight thousand, ninety-one".