68164487 has 4 divisors (see below), whose sum is σ = 68662176. Its totient is φ = 67666800.

The previous prime is 68164469. The next prime is 68164489. The reversal of 68164487 is 78446186.

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 68164487 - 2⁸ = 68164231 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 (68164489) 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, 248639 + ... + 248912.

It is an arithmetic number, because the mean of its divisors is an integer number (17165544).

Almost surely, 2^68164487 is an apocalyptic number.

68164487 is a deficient number, since it is larger than the sum of its proper divisors (497689).

68164487 is a wasteful number, since it uses less digits than its factorization.

68164487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 497688.

The product of its digits is 258048, while the sum is 44.

The square root of 68164487 is about 8256.1787165734. The cubic root of 68164487 is about 408.4943526379.

The spelling of 68164487 in words is "sixty-eight million, one hundred sixty-four thousand, four hundred eighty-seven".