68644523 has 2 divisors, whose sum is σ = 68644524. Its totient is φ = 68644522.

The previous prime is 68644519. The next prime is 68644559. The reversal of 68644523 is 32544686.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 68644523 - 2² = 68644519 is a prime.

It is not a weakly prime, because it can be changed into another prime (68644423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34322261 + 34322262.

It is an arithmetic number, because the mean of its divisors is an integer number (34322262).

Almost surely, 2^68644523 is an apocalyptic number.

68644523 is a deficient number, since it is larger than the sum of its proper divisors (1).

68644523 is an equidigital number, since it uses as much as digits as its factorization.

68644523 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 138240, while the sum is 38.

The square root of 68644523 is about 8285.1990320088. The cubic root of 68644523 is about 409.4510261303.

The spelling of 68644523 in words is "sixty-eight million, six hundred forty-four thousand, five hundred twenty-three".