268144687 has 4 divisors (see below), whose sum is σ = 270604840. Its totient is φ = 265684536.

The previous prime is 268144631. The next prime is 268144691. The reversal of 268144687 is 786441862.

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 268144687 - 2⁷ = 268144559 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (268144607) 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, 1229913 + ... + 1230130.

It is an arithmetic number, because the mean of its divisors is an integer number (67651210).

Almost surely, 2^268144687 is an apocalyptic number.

268144687 is a deficient number, since it is larger than the sum of its proper divisors (2460153).

268144687 is a wasteful number, since it uses less digits than its factorization.

268144687 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2460152.

The product of its digits is 516096, while the sum is 46.

The square root of 268144687 is about 16375.1240300646. The cubic root of 268144687 is about 644.8465768935.

The spelling of 268144687 in words is "two hundred sixty-eight million, one hundred forty-four thousand, six hundred eighty-seven".