68147393 has 6 divisors (see below), whose sum is σ = 70417602. Its totient is φ = 65948160.

The previous prime is 68147381. The next prime is 68147437. The reversal of 68147393 is 39374186.

It can be written as a sum of positive squares in only one way, i.e., 59105344 + 9042049 = 7688^2 + 3007^2 .

It is not a de Polignac number, because 68147393 - 2¹⁴ = 68131009 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 68147393.

It is not an unprimeable number, because it can be changed into a prime (68147333) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 34496 + ... + 36417.

It is an arithmetic number, because the mean of its divisors is an integer number (11736267).

Almost surely, 2^68147393 is an apocalyptic number.

It is an amenable number.

68147393 is a deficient number, since it is larger than the sum of its proper divisors (2270209).

68147393 is an equidigital number, since it uses as much as digits as its factorization.

68147393 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70975 (or 70944 counting only the distinct ones).

The product of its digits is 108864, while the sum is 41.

The square root of 68147393 is about 8255.1434269793. The cubic root of 68147393 is about 408.4602029579.

The spelling of 68147393 in words is "sixty-eight million, one hundred forty-seven thousand, three hundred ninety-three".