68539473 has 8 divisors (see below), whose sum is σ = 101540000. Its totient is φ = 45692964.

The previous prime is 68539469. The next prime is 68539477. The reversal of 68539473 is 37493586.

It is an interprime number because it is at equal distance from previous prime (68539469) and next prime (68539477).

It is not a de Polignac number, because 68539473 - 2² = 68539469 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68539477) 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 7 ways as a sum of consecutive naturals, for example, 1269223 + ... + 1269276.

It is an arithmetic number, because the mean of its divisors is an integer number (12692500).

Almost surely, 2^68539473 is an apocalyptic number.

It is an amenable number.

68539473 is a deficient number, since it is larger than the sum of its proper divisors (33000527).

68539473 is a wasteful number, since it uses less digits than its factorization.

68539473 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2538508 (or 2538502 counting only the distinct ones).

The product of its digits is 544320, while the sum is 45.

The square root of 68539473 is about 8278.8569863237. The cubic root of 68539473 is about 409.2420519902.

The spelling of 68539473 in words is "sixty-eight million, five hundred thirty-nine thousand, four hundred seventy-three".