68144401 has 4 divisors (see below), whose sum is σ = 73386292. Its totient is φ = 62902512.

The previous prime is 68144389. The next prime is 68144441. The reversal of 68144401 is 10444186.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5180176 + 62964225 = 2276^2 + 7935^2 .

It is a cyclic number.

It is not a de Polignac number, because 68144401 - 2¹⁷ = 68013329 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 68144401.

It is not an unprimeable number, because it can be changed into a prime (68144441) 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, 2620926 + ... + 2620951.

It is an arithmetic number, because the mean of its divisors is an integer number (18346573).

Almost surely, 2^68144401 is an apocalyptic number.

It is an amenable number.

68144401 is a deficient number, since it is larger than the sum of its proper divisors (5241891).

68144401 is a wasteful number, since it uses less digits than its factorization.

68144401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5241890.

The product of its (nonzero) digits is 3072, while the sum is 28.

The square root of 68144401 is about 8254.9622046379. The cubic root of 68144401 is about 408.4542250779.

Adding to 68144401 its reverse (10444186), we get a palindrome (78588587).

The spelling of 68144401 in words is "sixty-eight million, one hundred forty-four thousand, four hundred one".