68280453 has 12 divisors (see below), whose sum is σ = 98725068. Its totient is φ = 45475200.

The previous prime is 68280439. The next prime is 68280463. The reversal of 68280453 is 35408286.

It can be written as a sum of positive squares in 2 ways, for example, as 11985444 + 56295009 = 3462^2 + 7503^2 .

It is not a de Polignac number, because 68280453 - 2⁹ = 68279941 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68280463) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7651 + ... + 13967.

It is an arithmetic number, because the mean of its divisors is an integer number (8227089).

Almost surely, 2^68280453 is an apocalyptic number.

It is an amenable number.

68280453 is a deficient number, since it is larger than the sum of its proper divisors (30444615).

68280453 is a wasteful number, since it uses less digits than its factorization.

68280453 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7524 (or 7521 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 36.

The square root of 68280453 is about 8263.1987147835. The cubic root of 68280453 is about 408.7258740635.

The spelling of 68280453 in words is "sixty-eight million, two hundred eighty thousand, four hundred fifty-three".