68173893 has 28 divisors (see below), whose sum is σ = 108246348. Its totient is φ = 42768000.

The previous prime is 68173891. The next prime is 68173901. The reversal of 68173893 is 39837186.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 61732449 + 6441444 = 7857^2 + 2538^2 .

It is not a de Polignac number, because 68173893 - 2¹ = 68173891 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68173891) by changing a digit.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 9643 + ... + 15143.

It is an arithmetic number, because the mean of its divisors is an integer number (3865941).

Almost surely, 2^68173893 is an apocalyptic number.

It is an amenable number.

68173893 is a deficient number, since it is larger than the sum of its proper divisors (40072455).

68173893 is an equidigital number, since it uses as much as digits as its factorization.

68173893 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5536 (or 5521 counting only the distinct ones).

The product of its digits is 217728, while the sum is 45.

The square root of 68173893 is about 8256.7483309109. The cubic root of 68173893 is about 408.5131411172.

The spelling of 68173893 in words is "sixty-eight million, one hundred seventy-three thousand, eight hundred ninety-three".