268940691 has 6 divisors (see below), whose sum is σ = 388469900. Its totient is φ = 179293788.

The previous prime is 268940677. The next prime is 268940701. The reversal of 268940691 is 196049862.

It is a happy number.

It is not a de Polignac number, because 268940691 - 2⁷ = 268940563 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (268940621) 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 in 5 ways as a sum of consecutive naturals, for example, 14941141 + ... + 14941158.

Almost surely, 2^268940691 is an apocalyptic number.

268940691 is a deficient number, since it is larger than the sum of its proper divisors (119529209).

268940691 is a wasteful number, since it uses less digits than its factorization.

268940691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29882305 (or 29882302 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 45.

The square root of 268940691 is about 16399.4113004095. The cubic root of 268940691 is about 645.4840354425.

The spelling of 268940691 in words is "two hundred sixty-eight million, nine hundred forty thousand, six hundred ninety-one".