68269445 has 4 divisors (see below), whose sum is σ = 81923340. Its totient is φ = 54615552.

The previous prime is 68269441. The next prime is 68269447. The reversal of 68269445 is 54496286.

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 40538689 + 27730756 = 6367^2 + 5266^2 .

It is a cyclic number.

It is not a de Polignac number, because 68269445 - 2² = 68269441 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 68269396 and 68269405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68269441) 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, 6826940 + ... + 6826949.

It is an arithmetic number, because the mean of its divisors is an integer number (20480835).

Almost surely, 2^68269445 is an apocalyptic number.

It is an amenable number.

68269445 is a deficient number, since it is larger than the sum of its proper divisors (13653895).

68269445 is a wasteful number, since it uses less digits than its factorization.

68269445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13653894.

The product of its digits is 414720, while the sum is 44.

The square root of 68269445 is about 8262.5326020537. The cubic root of 68269445 is about 408.7039083030.

The spelling of 68269445 in words is "sixty-eight million, two hundred sixty-nine thousand, four hundred forty-five".