68470687 has 4 divisors (see below), whose sum is σ = 68993496. Its totient is φ = 67947880.

The previous prime is 68470673. The next prime is 68470709. The reversal of 68470687 is 78607486.

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 68470687 - 2⁷ = 68470559 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 (68470657) 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, 261208 + ... + 261469.

It is an arithmetic number, because the mean of its divisors is an integer number (17248374).

Almost surely, 2^68470687 is an apocalyptic number.

68470687 is a deficient number, since it is larger than the sum of its proper divisors (522809).

68470687 is a wasteful number, since it uses less digits than its factorization.

68470687 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 522808.

The product of its (nonzero) digits is 451584, while the sum is 46.

The square root of 68470687 is about 8274.7016260407. The cubic root of 68470687 is about 409.1051014859.

The spelling of 68470687 in words is "sixty-eight million, four hundred seventy thousand, six hundred eighty-seven".