68164531 has 4 divisors (see below), whose sum is σ = 68326864. Its totient is φ = 68002200.

The previous prime is 68164517. The next prime is 68164541. The reversal of 68164531 is 13546186.

It is a happy number.

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 68164531 - 2¹¹ = 68162483 is a prime.

It is a super-2 number, since 2×68164531² = 9292806572899922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68164501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 80535 + ... + 81376.

It is an arithmetic number, because the mean of its divisors is an integer number (17081716).

Almost surely, 2^68164531 is an apocalyptic number.

68164531 is a deficient number, since it is larger than the sum of its proper divisors (162333).

68164531 is a wasteful number, since it uses less digits than its factorization.

68164531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 162332.

The product of its digits is 17280, while the sum is 34.

The square root of 68164531 is about 8256.1813812440. The cubic root of 68164531 is about 408.4944405318.

The spelling of 68164531 in words is "sixty-eight million, one hundred sixty-four thousand, five hundred thirty-one".