68045547 has 4 divisors (see below), whose sum is σ = 90727400. Its totient is φ = 45363696.

The previous prime is 68045533. The next prime is 68045557. The reversal of 68045547 is 74554086.

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

It is not a de Polignac number, because 68045547 - 2⁴ = 68045531 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68045507) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11340922 + ... + 11340927.

It is an arithmetic number, because the mean of its divisors is an integer number (22681850).

Almost surely, 2^68045547 is an apocalyptic number.

68045547 is a deficient number, since it is larger than the sum of its proper divisors (22681853).

68045547 is a wasteful number, since it uses less digits than its factorization.

68045547 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22681852.

The product of its (nonzero) digits is 134400, while the sum is 39.

The square root of 68045547 is about 8248.9724814670. The cubic root of 68045547 is about 408.2566208059.

The spelling of 68045547 in words is "sixty-eight million, forty-five thousand, five hundred forty-seven".