26315687 has 4 divisors (see below), whose sum is σ = 26561736. Its totient is φ = 26069640.

The previous prime is 26315671. The next prime is 26315689. The reversal of 26315687 is 78651362.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 78651362 = 2 ⋅39325681.

It is a cyclic number.

It is not a de Polignac number, because 26315687 - 2⁴ = 26315671 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 26315687.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26315689) 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 3 ways as a sum of consecutive naturals, for example, 122864 + ... + 123077.

It is an arithmetic number, because the mean of its divisors is an integer number (6640434).

Almost surely, 2^26315687 is an apocalyptic number.

26315687 is a deficient number, since it is larger than the sum of its proper divisors (246049).

26315687 is a wasteful number, since it uses less digits than its factorization.

26315687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 246048.

The product of its digits is 60480, while the sum is 38.

The square root of 26315687 is about 5129.8817725168. The cubic root of 26315687 is about 297.4437885465.

The spelling of 26315687 in words is "twenty-six million, three hundred fifteen thousand, six hundred eighty-seven".